[PATCH v2 0/1] MR3513: include: Add IXAudio2Extension in xaudio2.idl.

[Biswapriyo Nath (＠Biswa96)]

Required for rpcs3 project.

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  v2: include: Add IXAudio2Extension in xaudio2.idl.
 
https://gitlab.winehq.org/wine/wine/-/merge_requests/3513