This adds two command line options to llvm-pdbdump.
--source-files prints a flat list of all source files in the PDB.
--compilands prints a list of all compilands (e.g. object files)
that the PDB knows about, and for each one, a list of
source files that the compiland is composed of as well
as a hash of the original source file.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227276 91177308-0d34-0410-b5e6-96231b3b80d8