[IA64] Fix bogus messages about system calls not implemented.

There are seven legacy system calls that ia64 doesn't implement, but glibc
provides equivalent functionality by using more modern system calls. Stop
checksyscalls.sh from complaining about these seven.
Signed-off-by: Tony Luck <tony.luck@intel.com>

include/asm-ia64/unistd.h

@@ -305,6 +305,19 @@
 
 #define NR_syscalls			286 /* length of syscall table */
 
+/*
+ * The following defines stop scripts/checksyscalls.sh from complaining about
+ * unimplemented system calls.  Glibc provides for each of these by using
+ * more modern equivalent system calls.
+ */
+#define __IGNORE_fork		/* clone() */
+#define __IGNORE_time		/* gettimeofday() */
+#define __IGNORE_alarm		/* setitimer(ITIMER_REAL, ... */
+#define __IGNORE_pause		/* rt_sigprocmask(), rt_sigsuspend() */
+#define __IGNORE_utime		/* utimes() */
+#define __IGNORE_getpgrp	/* getpgid() */
+#define __IGNORE_vfork		/* clone() */
+
 #define __ARCH_WANT_SYS_RT_SIGACTION
 #define __ARCH_WANT_SYS_RT_SIGSUSPEND