Merge branch 'packer/fix_team_chat_beep' into 'master'

fix team chat beep sound

There are two beep sounds :
* General chat and (**talk.wav**)
* team messages (**talk2.wav**)

These should not be converted to **ogg**, otherwise the engine does not find **talk2.wav**.

See: https://gitlab.com/xonotic/darkplaces/blob/div0-stable/cl_parse.c#L517

This causes that the beep sound for general chat is used for team messages, too.

The script *cached_converter.sh* already tries excludes them (But uses wrong path.)

See merge request !15