script: Add image tile support.
On Ubuntu, we use script plugin to make plymouth splash screen match gnome-shell for a flickerless transition. Recently gnome-shell uses noise tile, to replicate that effect I need tile support in the script plugin. With this patch in place, I was able to script pixel perfect plymouth screen matching gnome-shell background.
Hope it's ok to expose tile function in the script plugin.
Signed-off-by: Dimitri John Ledkov xnox@ubuntu.com