[PATCH] x86_64: compat_sys_futimesat fix

We need to use the compat function here.

Pointer out by Heiko Carstens <heiko.carstens@de.ibm.com>

Cc: Andi Kleen <ak@muc.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>