Fix unicode font issue under systemd by ensuring proper setup order

Fix unicode font issue under systemd by ensuring proper setup order

We need to set up the fonts and only *then* run loadkeys,
and finally invoke unicode_start. Otherwise the unicode
setup is incomplete and fonts aren't displayed properly.

Found hint inside https://bugs.freedesktop.org/show_bug.cgi?id=80685 +
https://cgit.freedesktop.org/systemd/systemd/commit/?id=abee28c56d

Thanks to Sipwise for sponsoring my development time.
Closes Sipwise internal ticket TT#17028.

Closes: https://github.com/grml/grml/issues/50