New comment by ifreund on void-packages repository

https://github.com/void-linux/void-packages/pull/24580#issuecomment-688806312

Comment:
This should be ready to go now. Upstream pushed a new tag including fixes for the issues mention and versioning the `.so`.

I also added a default disabled build option for elogind support as I think most users of seatd will be using it because they do not want to use elogind.