New review comment by circhioz on void-packages repository

https://github.com/void-linux/void-packages/pull/28570#discussion_r571723731

Comment:
It does absolutely nothing with the library, yet it requires `ply-boot-client.pc` to be present at configure time. Code just spawns `plymouth` binary and that's all.

The quirky logic comes from a patch written by Fedora devs 11 years ago. My best guess is that it was upstreamed without anyone knowing what it really did.