syscall: fix // +build comments in types_*.go

I fixed types_linux.go yesterday but missed the others.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5620054

src/pkg/syscall/types_darwin.go

@@ -2,12 +2,12 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build ignore
+
 /*
 Input to cgo -godefs.  See also mkerrors.sh and mkall.sh
 */
 
-// +build ignore
-
 // +godefs map struct_in_addr [4]byte /* in_addr */
 // +godefs map struct_in6_addr [16]byte /* in6_addr */
 

src/pkg/syscall/types_freebsd.go

@@ -2,12 +2,12 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build ignore
+
 /*
 Input to cgo -godefs.  See also mkerrors.sh and mkall.sh
 */
 
-// +build ignore
-
 // +godefs map struct_in_addr [4]byte /* in_addr */
 // +godefs map struct_in6_addr [16]byte /* in6_addr */
 

src/pkg/syscall/types_linux.go

@@ -2,10 +2,12 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// Input to cgo -godefs.  See also mkerrors.sh and mkall.sh
-
 // +build ignore
 
+/*
+Input to cgo -godefs.  See also mkerrors.sh and mkall.sh
+*/
+
 // +godefs map struct_in_addr [4]byte /* in_addr */
 // +godefs map struct_in6_addr [16]byte /* in6_addr */
 

src/pkg/syscall/types_netbsd.go

@@ -2,12 +2,12 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build ignore
+
 /*
 Input to cgo -godefs.  See also mkerrors.sh and mkall.sh
 */
 
-// +build ignore
-
 // +godefs map struct_in_addr [4]byte /* in_addr */
 // +godefs map struct_in6_addr [16]byte /* in6_addr */
 

src/pkg/syscall/types_openbsd.go

@@ -2,12 +2,12 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build ignore
+
 /*
 Input to cgo -godefs.  See also mkerrors.sh and mkall.sh
 */
 
-// +build ignore
-
 // +godefs map struct_in_addr [4]byte /* in_addr */
 // +godefs map struct_in6_addr [16]byte /* in6_addr */