[PATCH v2 0/2] MR9190: win32u: Add stub and basic tests for D3DKMT keyed mutexes.

[Rémi Bernon]

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  v2: win32u/tests: Test acquire / release of D3DKMT keyed mutexes.
      win32u: Stub NtGdiDdDDI(Acquire|Release)KeyedMutex(2) syscalls.
 
https://gitlab.winehq.org/wine/wine/-/merge_requests/9190