Wire up support for the controlling the extended dwarf .file directive. With
r142300 but not this patch, clang -S may emit .s files that assemblers other
than llvm-mc can't parse.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@142301 91177308-0d34-0410-b5e6-96231b3b80d8
7 files changed