-- v21: vccorlib140: Implement __abi_translateCurrentException. vccorlib140: Throw exceptions on error paths. vccorlib140: Add Platform::Exception::CreateException() implementation. vccorlib140: Add Platform::Exception::Message::get() implementation. vccorlib140: Add Platform::COMException constructor implementation. vccorlib140: Add Platform::Exception(HSTRING) constructor implementation. vccorlib140: Add Platform::Exception constructor implementation. msvcrt: Move TYPE_FLAG* and CLASS_IS* defines to cxx.h. vccorlib140: Remove platform_ prefix from exception function names. vccorlib140: Move exception functions to new file. vccorlib140/tests: Add additional tests for exception objects.