Port packages to Beowulf

[MerlijnWajer]

I've started porting packages to Beowulf/Buster, for at least the ones I built / "maintain":

• [ ] brainparty (DONE, needs to be built, needs mesa gles1 headers; see https://github.com/maemo-leste/bugtracker/issues/333)
• [x] brainparty-data (DONE, needs to be built)
• [x] wifi-signal-applet
• [x] simple-brightness-applet
• [x] scummvm
• [x] binaryclock-plugin
• [ ] crazyparking
• [x] osso-mahjong
• [ ] uae4all
• [x] sojourner