asmlinkage, x86: Fix 32bit memcpy for LTO

These functions can be called implicitely from gcc, and thus need to be
visible.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/1391845930-28580-11-git-send-email-ak@linux.intel.com


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