[PATCH v4 0/4] MR1979: msvcrt: Remaining stubs for cm3

[Torge Matthies (＠tmatthies)]

Based on !2524.

This adds the remaining stubs needed for Crazy Machines 3 to work and decode preview images correctly in online mode.

--
  v4: msvcr110: Implement _Context::_IsSynchronouslyBlocked.
      msvcr110: Add _Context::_IsSynchronouslyBlocked stub.
      msvcr110: Add _Cancellation_beacon::_Cancellation_beacon_dtor stub.
      msvcr110: Add _Cancellation_beacon::_Cancellation_beacon_ctor stub.
 
https://gitlab.winehq.org/wine/wine/-/merge_requests/1979