[PATCH v2 0/3] MR5578: Draft: msvcp140_atomic_wait: Partially implement __std_tzdb functions.

[Aida Jonikienė]

OpenImageViewer requires all of these functions for the file information menu to work.

This implementation references the open-source (Apache 2.0) STL code: https://github.com/microsoft/STL/blob/main/stl/src/tzdb.cpp

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  v2: msvcp140_atomic_wait/tests: Add tests for the __std_tzdb functions.
      msvcp140_atomic_wait: Partially implement __std_tzdb_*_leap_seconds().
 
https://gitlab.winehq.org/wine/wine/-/merge_requests/5578