New review comment by Johnnynator on void-packages repository

https://github.com/void-linux/void-packages/pull/33137#discussion_r716243430

Comment:
Please add a line break after ~70 chars or smth.
Also change the prefix to smth like `/usr/lib/OpenJK` instead of `/opt`, `/opt` is for all kind of weird Third Party stuff, not packages in the repo.