This adds plymouth

[ng0]

[PATCH] gnu: Add plymouth.

For system fancyness, is someone really motivated to write an shepherd 
integration and service for plymouth?
I made it build for now. But if you touch plymouth in the process, I advise you 
not to, or directly send
changes upstream. Or have some fun backporting automake-1.14. I only succeeded 
because I stoped touching
files.
It's an early boot application (the boot splash screen you see when starting 
TAILS, Fedora and others),
so without system integration it will not work.