[PATCH 0/1] MR7762: winegstreamer: Push flush event when flushing.

[Brendan McGrath (＠redmcg)]

This ensures the gstreamer pipeline is empty whilst we flush our
queues.

Fixes an issue with the video freezing when seeking within Quantum Break.

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https://gitlab.winehq.org/wine/wine/-/merge_requests/7762