The update to Wine 5.0.4 brought a potential build problem depending
on options chosen and packages installed (or not).

Temporarily add a patch files/patch-dlls_qcap_v4l.c to resolve problems
where v4l (multimedia/libv4l) is used when present, even if explicitly
disabled during ./configure.

PR: 254601
Submitted by: Felix Palmen <felix@palmen-it.de>