New comment by Duncaen on void-packages repository

https://github.com/void-linux/void-packages/pull/37720#issuecomment-1169335410

Comment:
Instead of copying `do_install` you can add a `post_install` function that insatlls the additional files.

Please squash the commits and format the commit message according to [CONTRIBUTING.md](https://github.com/void-linux/void-packages/blob/master/CONTRIBUTING.md#committing-your-changes), something like `fillets-ng: include game data`.