[IA64] Add stub entry to fsys.S for sys_migrate_pages

When this new syscall was added to ia64 in commit

  39743889aaf76725152f16aa90ca3c45f6d52da3

fsys.S was forgotten.  Add a ".data8 0" there to keep
it in step.  [Reported by Stephane Eranian]

Signed-off-by: Tony Luck <tony.luck@intel.com>

arch/ia64/kernel/fsys.S

@@ -903,5 +903,6 @@ fsyscall_table:
 	data8 0
 	data8 0
 	data8 0
+	data8 0							// 1280
 
 	.org fsyscall_table + 8*NR_syscalls	// guard against failures to increase NR_syscalls