[lit, pdb] Fix two failing PDB tests on Windows

Summary: One of the tests is failing to build because it needs GS-, the second test does not correctly match all the expected function names because newer DIA SDKs annotate the function names with their return type and inputs (e.g. "static long `anonymous namespace'::StaticFunction(int)")

Reviewers: asmith, zturner

Reviewed By: zturner

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D47653

llvm-svn: 333790