Make the version within makefile overwriteable

[tboerger]

The maintainers of the Alpine package asked to make the version overwriteable to match the version format required by APK.

[clandmeter]

The makefile will try to lookup the version from git, but when building from tarball it will find the git information from the parent git repo (in this case Alpine Linux aports).

We now try to fix it by using:

https://github.com/alpinelinux/aports/blob/master/community/gitea/allow-to-set-version.patch

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs during the next 2 weeks. Thank you for your contributions.