[ms-cxxabi] Add more tests for r178297

This covers a few cases where the class of a member pointer is not a
CXXRecordDecl.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178307 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed