This update is necessary due to API changes in libtoxcore. Sad to say that
the recent stable version doesn't work with our libtoxcore. We need to
update to the recent dev version.
Unfortunately they've changed their build system to be makefile-only and
they don't seem to include test cases in the CLI anymore, so we needed
to adapt accordingly. Also added freealut and openal to the buildInputs,
in order to allow audio support.
Signed-off-by: aszlig <aszlig@redmoonstudios.org>
