Re: [PATCH 3/3] widl: Prefer mangled name over typedef in WinRT mode.

[Rémi Bernon]

Forgot to mention in the notes, but currently the C++ generated code 
differs completely between MIDL and WIDL in WinRT mode.

This changes the generated C++ code too, it was probably broken before, 
and it's still probably broken after.

I don't think it's realistic to try addressing it, as the MIDL C++ code 
heavily relies on external WinRT C++ runtime headers.