i386: Wire up the renameat2() syscall

The renameat2() system call was only wired up for x86-64.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Link: http://lkml.kernel.org/r/1397211951-20549-2-git-send-email-miklos@szeredi.hu


Cc: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>