Copy them from Linux v3.16 tag.
My main motivation of this commit is to add compiler-clang.h.
Signed-off-by: NMasahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Jeroen Hofstee <jeroen@myspectrum.nl>

When include/linux/compiler.h is included, the associated gcc3
header is required for older build environments.
Signed-off-by: NScott McNutt <smcnutt@psyent.com>
Acked-by: NMike Frysinger <vapier@gentoo.org>