Last part of support for generating dwarf for assembly source files.  This gets
the clang driver to enable this when assembling a .s file.  rdar://9275556


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147167 91177308-0d34-0410-b5e6-96231b3b80d8
5 files changed