New comment by sgn on void-packages repository

https://github.com/void-linux/void-packages/pull/21272#issuecomment-621682684

Comment:
> Is license change a common enough problem that
> it's worth adding a checksum? The point of `license_files` is
> to simplify license installation, not increase the burden.

The point is: license should be changed _very_ rarely.
If there's a change in LICENSE, we need to know and update the license field.
Hence, I think adding a checksum makes more sense to me.