New comment by sgn on void-packages repository

https://github.com/void-linux/void-packages/pull/25464#issuecomment-711133272

Comment:
@ahesford `iana-etc` update requires running a script in `files/` to generate updated file.
See https://github.com/void-linux/void-packages/commit/d0f5593785763d19afabcdc378f55a1183bb2717