bug#26970: plymouth

[Ricardo Wurmus]

Commit 5b9bdeb52cc25e35e74bbc10fa102e3fcc4baab9 adds Plymouth.

I updated to 0.9.4, removed all the unnecessary configure and make
flags, removed GTK support because it blew up the closure size from
~200MB to 800MB, which isn’t suitable for use in an initrd.

I tried using it in a VM, but I haven’t yet been able to make the splash
appear.  It seems to be unable to find a graphical display and switches
to the “detailed” view, which merely prints to the console.

I did try loading uvesafb in the initrd, but all I get is a garbled
screen.

On the plus side, plymouth does work as expected on my booted machine,
so I went ahead and pushed the commit.

--
Ricardo