New review comment by sgn on void-packages repository

https://github.com/void-linux/void-packages/pull/22484#discussion_r457762207

Comment:
Force them read this hooks if exists, maybe.
Rather messy but I don't like different parts of system refusing co-operating with each others. Just make sure variable introduced by this change doesn't overlap with them, I can make it works.
I like this idea, (so I can sign the whole efi, my initrd is unsigned, now) but I don't use gummiboot, for example.