clang: add support for neon-vfp instructions

Originally by noobnl, some small adjustments in merge to fit into 4.4

Change-Id: I28e89e67a26f065ef2de3e8c23b8513b138f1a54
clang: add support for neon-vfp instructions

Conflicts:
	lib/Driver/Tools.cpp

Change-Id: Iba9b39b286f97117f1e93dcc5d234a44f02a46de
Merge "clang: add support for neon-vfp instructions" into kk4.4
Merge remote-tracking branch 'github/kk4.4' into slim-master

Conflicts:
	lib/Driver/Tools.cpp