[PATCH 5] winmm/tests: Add MCI waveaudio tests.

Paul Virnes wrote:
> > What I'm missing is sort of the converse of skip:
> > Perform a test on all platforms *except* Wine
>
> Isn't there anything in your current test suite that succeeds on Windows
> but fails on Wine?

This is it!
So simple, right in front of my eyes.
Thanks,
  Jörg Höhle.