Switch back to classic Windows PDBs
Switch back to classic Windows PDBs

Prior to Visual Studio 2017 Update 3, the Roslyn compilers only
supported SourceLink for the new portable PDB format. With Update 3,
SourceLink is also supported with the classic Windows PDB format.

This commit reverts back from portable PDBs to classic PDBs because
some existing .NET tooling (among them TFS, apparently) simply cannot
yet deal with portable PDBs correctly, causing some people's build
processes to fail.

Moq/moq4,ocoanet/moq4