Update to Wine 5.21. This includes the following changes:

• GDI32 library converted to PE.
• More fixes for windowless RichEdit.
• A number of timezone updates.
• Various bug fixes.

files/extrapatch-server-file.c that I added to work around upstream
breakage with the Wine Staging patchset is not necessary any longer,
nor is half of files/extrapatch-dlls-ntdll-unix-file.c.