syscall: include mmap constants in netbsd zerror* files

Include the <sys/mman.h> header for NetBSD mkerrors.sh. This brings
in constants used with mmap(2), msync(2) and mlockall(2).

The regeneration of the NetBSD zerror* files also picks clone(2)
related constants.

Update #4929.

R=golang-codereviews, bradfitz
CC=golang-codereviews
https://golang.org/cl/45510044

src/pkg/syscall/mkerrors.sh

@@ -118,6 +118,7 @@ includes_NetBSD='
 #include <sys/types.h>
 #include <sys/param.h>
 #include <sys/event.h>
+#include <sys/mman.h>
 #include <sys/socket.h>
 #include <sys/sockio.h>
 #include <sys/sysctl.h>

src/pkg/syscall/zerrors_netbsd_386.go

@@ -146,6 +146,14 @@ const (
 	BRKINT                            = 0x2
 	CFLUSH                            = 0xf
 	CLOCAL                            = 0x8000
+	CLONE_CSIGNAL                     = 0xff
+	CLONE_FILES                       = 0x400
+	CLONE_FS                          = 0x200
+	CLONE_PID                         = 0x1000
+	CLONE_PTRACE                      = 0x2000
+	CLONE_SIGHAND                     = 0x800
+	CLONE_VFORK                       = 0x4000
+	CLONE_VM                          = 0x100
 	CREAD                             = 0x800
 	CS5                               = 0x0
 	CS6                               = 0x100
@@ -962,6 +970,40 @@ const (
 	LOCK_NB                           = 0x4
 	LOCK_SH                           = 0x1
 	LOCK_UN                           = 0x8
+	MADV_DONTNEED                     = 0x4
+	MADV_FREE                         = 0x6
+	MADV_NORMAL                       = 0x0
+	MADV_RANDOM                       = 0x1
+	MADV_SEQUENTIAL                   = 0x2
+	MADV_SPACEAVAIL                   = 0x5
+	MADV_WILLNEED                     = 0x3
+	MAP_ALIGNMENT_16MB                = 0x18000000
+	MAP_ALIGNMENT_1TB                 = 0x28000000
+	MAP_ALIGNMENT_256TB               = 0x30000000
+	MAP_ALIGNMENT_4GB                 = 0x20000000
+	MAP_ALIGNMENT_64KB                = 0x10000000
+	MAP_ALIGNMENT_64PB                = 0x38000000
+	MAP_ALIGNMENT_MASK                = -0x1000000
+	MAP_ALIGNMENT_SHIFT               = 0x18
+	MAP_ANON                          = 0x1000
+	MAP_FILE                          = 0x0
+	MAP_FIXED                         = 0x10
+	MAP_HASSEMAPHORE                  = 0x200
+	MAP_INHERIT                       = 0x80
+	MAP_INHERIT_COPY                  = 0x1
+	MAP_INHERIT_DEFAULT               = 0x1
+	MAP_INHERIT_DONATE_COPY           = 0x3
+	MAP_INHERIT_NONE                  = 0x2
+	MAP_INHERIT_SHARE                 = 0x0
+	MAP_NORESERVE                     = 0x40
+	MAP_PRIVATE                       = 0x2
+	MAP_RENAME                        = 0x20
+	MAP_SHARED                        = 0x1
+	MAP_STACK                         = 0x2000
+	MAP_TRYFIXED                      = 0x400
+	MAP_WIRED                         = 0x800
+	MCL_CURRENT                       = 0x1
+	MCL_FUTURE                        = 0x2
 	MSG_BCAST                         = 0x100
 	MSG_CMSG_CLOEXEC                  = 0x800
 	MSG_CONTROLMBUF                   = 0x2000000
@@ -980,6 +1022,9 @@ const (
 	MSG_TRUNC                         = 0x10
 	MSG_USERFLAGS                     = 0xffffff
 	MSG_WAITALL                       = 0x40
+	MS_ASYNC                          = 0x1
+	MS_INVALIDATE                     = 0x2
+	MS_SYNC                           = 0x4
 	NAME_MAX                          = 0x1ff
 	NET_RT_DUMP                       = 0x1
 	NET_RT_FLAGS                      = 0x2
@@ -1039,10 +1084,14 @@ const (
 	PARMRK                            = 0x8
 	PARODD                            = 0x2000
 	PENDIN                            = 0x20000000
-	PRI_IOFLUSH                       = 0x7c
 	PRIO_PGRP                         = 0x1
 	PRIO_PROCESS                      = 0x0
 	PRIO_USER                         = 0x2
+	PRI_IOFLUSH                       = 0x7c
+	PROT_EXEC                         = 0x4
+	PROT_NONE                         = 0x0
+	PROT_READ                         = 0x1
+	PROT_WRITE                        = 0x2
 	RLIMIT_AS                         = 0xa
 	RLIMIT_CORE                       = 0x4
 	RLIMIT_CPU                        = 0x0

src/pkg/syscall/zerrors_netbsd_amd64.go

@@ -146,6 +146,14 @@ const (
 	BRKINT                            = 0x2
 	CFLUSH                            = 0xf
 	CLOCAL                            = 0x8000
+	CLONE_CSIGNAL                     = 0xff
+	CLONE_FILES                       = 0x400
+	CLONE_FS                          = 0x200
+	CLONE_PID                         = 0x1000
+	CLONE_PTRACE                      = 0x2000
+	CLONE_SIGHAND                     = 0x800
+	CLONE_VFORK                       = 0x4000
+	CLONE_VM                          = 0x100
 	CREAD                             = 0x800
 	CS5                               = 0x0
 	CS6                               = 0x100
@@ -952,6 +960,40 @@ const (
 	LOCK_NB                           = 0x4
 	LOCK_SH                           = 0x1
 	LOCK_UN                           = 0x8
+	MADV_DONTNEED                     = 0x4
+	MADV_FREE                         = 0x6
+	MADV_NORMAL                       = 0x0
+	MADV_RANDOM                       = 0x1
+	MADV_SEQUENTIAL                   = 0x2
+	MADV_SPACEAVAIL                   = 0x5
+	MADV_WILLNEED                     = 0x3
+	MAP_ALIGNMENT_16MB                = 0x18000000
+	MAP_ALIGNMENT_1TB                 = 0x28000000
+	MAP_ALIGNMENT_256TB               = 0x30000000
+	MAP_ALIGNMENT_4GB                 = 0x20000000
+	MAP_ALIGNMENT_64KB                = 0x10000000
+	MAP_ALIGNMENT_64PB                = 0x38000000
+	MAP_ALIGNMENT_MASK                = -0x1000000
+	MAP_ALIGNMENT_SHIFT               = 0x18
+	MAP_ANON                          = 0x1000
+	MAP_FILE                          = 0x0
+	MAP_FIXED                         = 0x10
+	MAP_HASSEMAPHORE                  = 0x200
+	MAP_INHERIT                       = 0x80
+	MAP_INHERIT_COPY                  = 0x1
+	MAP_INHERIT_DEFAULT               = 0x1
+	MAP_INHERIT_DONATE_COPY           = 0x3
+	MAP_INHERIT_NONE                  = 0x2
+	MAP_INHERIT_SHARE                 = 0x0
+	MAP_NORESERVE                     = 0x40
+	MAP_PRIVATE                       = 0x2
+	MAP_RENAME                        = 0x20
+	MAP_SHARED                        = 0x1
+	MAP_STACK                         = 0x2000
+	MAP_TRYFIXED                      = 0x400
+	MAP_WIRED                         = 0x800
+	MCL_CURRENT                       = 0x1
+	MCL_FUTURE                        = 0x2
 	MSG_BCAST                         = 0x100
 	MSG_CMSG_CLOEXEC                  = 0x800
 	MSG_CONTROLMBUF                   = 0x2000000
@@ -970,6 +1012,9 @@ const (
 	MSG_TRUNC                         = 0x10
 	MSG_USERFLAGS                     = 0xffffff
 	MSG_WAITALL                       = 0x40
+	MS_ASYNC                          = 0x1
+	MS_INVALIDATE                     = 0x2
+	MS_SYNC                           = 0x4
 	NAME_MAX                          = 0x1ff
 	NET_RT_DUMP                       = 0x1
 	NET_RT_FLAGS                      = 0x2
@@ -1029,10 +1074,14 @@ const (
 	PARMRK                            = 0x8
 	PARODD                            = 0x2000
 	PENDIN                            = 0x20000000
-	PRI_IOFLUSH                       = 0x7c
 	PRIO_PGRP                         = 0x1
 	PRIO_PROCESS                      = 0x0
 	PRIO_USER                         = 0x2
+	PRI_IOFLUSH                       = 0x7c
+	PROT_EXEC                         = 0x4
+	PROT_NONE                         = 0x0
+	PROT_READ                         = 0x1
+	PROT_WRITE                        = 0x2
 	RLIMIT_AS                         = 0xa
 	RLIMIT_CORE                       = 0x4
 	RLIMIT_CPU                        = 0x0