New comment by Johnnynator on void-packages repository

https://github.com/void-linux/void-packages/pull/25703#issuecomment-711148335

Comment:
leah did prepare a template for gn earllier: https://l2.re/X4Opzr . You could update and use that. But make sure to use the `-c` flag of `xgensum`, since google does recreate tarballs on every fetch, so metadata changes.