[PDB] Fix type server handling for archives

Summary:
This fixes type indices for SDK or CRT static archives. Previously we'd
try to look next to the archive object file path, which would not exist
on the local machine.

Also error out if we can't resolve a type server record. Hypothetically
we can recover from this error by discarding debug info for this object,
but that is not yet implemented.

Reviewers: ruiu, amccarth

Subscribers: aprantl, hiraditya, llvm-commits

Differential Revision: https://reviews.llvm.org/D35369

llvm-svn: 307946