The Wine Staging patchset for Wine 5.13 is now available and fixed
(compared to the previous one).

It also addresses the build issue for Wine 5.13 that I fixed via
files/patch-dlls-ntdll-unix-registry.c, so we need to make that
patch only apply when the Wine Staging patchset is not used.

PR: 248118
Submitted by: vvd@unislabs.com