Add support to -Wa,--version in clang

Clang currently only supports -Wa,--version when -no-integrated-as is
used. This adds support to -Wa,--version with -integrated-as.

Link:
https://github.com/ClangBuiltLinux/linux/issues/1320

Reviewed By: nickdesaulniers, MaskRay

Differential Revision: https://reviews.llvm.org/D99556