[PATCH v2 0/7] MR624: win32u: Fix last error handling on wow64.

[Jacek Caban (＠jacek)]

This changes unixlib code to set last error in both TEBs on wow64. We could potentially try to sync them in wow64win thunks instead, but changing error setters seems more reliable.

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  v2: wow64win: Set last error in 32-bit TEB in wow64 thunks.
      winemac: Use RtlSetLastWin32Error.
      wineandroid: Use RtlSetLastWin32Error.
      winex11: Use RtlSetLastWin32Error.
      win32u: Use RtlSetLastWin32Error.
      include: Use RtlSetLastWin32Error in server.h.
      ntdll: Introduce RtlSetLastWin32Error for unixlibs that additionally sets 32-bit error on wow64.

https://gitlab.winehq.org/wine/wine/-/merge_requests/624