On Kubuntu 16.04.5 LTS with 'rpmbuild 4.12.0.1' and 'debbuild 18.10.3',
a few modifications are necessary to create installation packages from
the latest tarball.
1. Adding comments after %build as building is not
required in this case
2. Putting the %post and %postun sections after %clean
3. Adding to the %changelog