Driver/IA: Accept and ignore -force_cpusubtype_ALL, as in 'clang -c
-Wa,-force_cpusubtype_ALL t.c'.
 - Tweaks -Wa, and -Xassembler handling to only accept an explicit short list of
   arguments and give an obvious unsupported error on others.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@116759 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed