CFI: Get check-cfi passing on Windows.

Specifically:

- Start using %expect_crash.

- Provide an implementation of __ubsan::getDynamicTypeInfoFromVtable
  for the Microsoft C++ ABI. This is all that is needed for CFI
  diagnostics; UBSan's -fsanitize=vptr also requires an implementation of
  __ubsan::checkDynamicType.

- Build the sanitizer runtimes against the release version of the C
  runtime, even in debug builds.

- Accommodate demangling differences in tests.

Differential Revision: http://reviews.llvm.org/D11029

llvm-svn: 241745