[LLVM-C] Add Accessors For A Module's Source File Name

Summary: Also unblocks some cleanup in the echo-test.

Reviewers: whitequark, deadalnix

Reviewed By: whitequark

Subscribers: harlanhaskins, llvm-commits

Differential Revision: https://reviews.llvm.org/D42618

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@323819 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed