OpenArena for Ubuntu

This bug already fixed in Debian 10: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=966150 , but not fixed in Ubuntu 20.04: https://bugs.launchpad.net/ubuntu/+source/openarena/+bug/1882432

You can repeat workaround steps from Michael Becker, to build fresh libraries from source:

• git clone [email protected]:OpenArena/gamecode — this takes about 10 MB disk space
• make — build binary files
• sudo cp -pv --backup build/release-linux-x86_64/oax/*.so /usr/lib/openarena/baseoa/pak6-patch088/ — I changed this command to add verbosity and create a backup of original files automatically

Now OpenArena starts fine!