Add cdb test for inline line tables
This creates an integration test for inlined call line tables, and in
particular, ones that are discontiguous. We've had issues in the past
with discontiguous inline line tables, and until r362429 LLD didn't
write the inlinees section into the PDB.
The test was reduced from https://crbug.com/965670
Differential Revision: https://reviews.llvm.org/D62758