x86, syscall: Need __ARCH_WANT_SYS_IPC for 32 bits

In checkin

303395ac3bf3 x86: Generate system call tables and unistd_*.h from tables

the feature macros in <asm/unistd.h> were unified between 32 and 64
bits. Unfortunately 32 bits requires __ARCH_WANT_SYS_IPC and this was
inadvertently dropped.

Reported-by: Dmitry Kasatkin <[e-mail]>
Cc: Linus Torvalds <[e-mail]>
Signed-off-by: H. Peter Anvin <[e-mail]>
Link: http://lkml.kernel.org/r/CALLzPKbeXN5gdngo8uYYU8mAow=[e-mail]

arch/x86/include/asm/unistd.h

···
 #  include <asm/unistd_32.h>
 #  define __ARCH_WANT_IPC_PARSE_VERSION
 #  define __ARCH_WANT_STAT64
+#  define __ARCH_WANT_SYS_IPC
 #  define __ARCH_WANT_SYS_OLD_MMAP
 #  define __ARCH_WANT_SYS_OLD_SELECT