[ms-inline asm]  Add support for clobbers in CodeGen.

This is a reapplication of r161914 now that the scoping issue has been resolved
in r161966.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@161967 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed