[bug#74411] freedict-dictionaries build non-deterministic

[Runciter]

The build of the package freedict-dictionaries is non-deterministic, at
least because the output dictionaries are compressed by the utility
dictzip, which includes a timestamp in the compressed file headers.

I have not confirmed it yet but I think I could fix it: it would involve
a patch to the freedict-tools package, and then output dictionaries of
freedict-dictionaries would not be compressed.

The maintainers should just tell me if it's worth it to fix
non-determinism in this way: we have to carry forward a patch (unless a
better idea comes up), and we lose the benefit of compressing the outputs.