New comment by ericonr on void-packages repository

https://github.com/void-linux/void-packages/pull/28674#issuecomment-778673687

Comment:
I don't love this solution, but that's mainly because I don't like vendoring in desktop files. If you can generate the desktop file reliably with a sed on the original desktop file at build time, I'd rather have that.

Besides that, LGTM. Maybe make the INSTALL msg a `README.voidlinux` instead? Otherwise the message will always be there.