get the sources from git. This fixes a FTBFS with ffmpeg-7 in
Factory. Note that we can't use @PARENT_TAG@ in the _service
file because 0.8.1 was branched from the v0.8 branch so using it
would look like going back to 0.8.0.
- Add a patch to keep building with older ffmpeg versions too
as well as find the gmp dependency, which can't be found using
pkgconfig in 15.6:
* fix-build-in-15.6.patch
OBS-URL: https://build.opensuse.org/package/show/X11:Wayland/neatvnc?expand=0&rev=28
