emulators/wine-devel: Add ffmpeg support with winemdo

This fixes issues where cutscene will just hang indefinitely when using
gstreamer.

Once build with ffmpeg, it can be activated with the following:
The new implementation can be enabled by setting the DWORD value:
DisableGstByteStreamHandler = 1
in the HKCU\Software\Wine\MediaFoundation registry key.

The default is to use gstreamer, so if the user does not change the
registry key, this should not change much.

PR: 290775