Bug#1015782: live-build: Replace a few more values in the splash SVG

[Petter Reinholdtsen]

Control: tags -1 + patch

Do you need a new patch with less variables, or is the patch as sent OK?
I believe it is better to make the complete set of variables available
for SVG authors, and thus hope the original patch can be accepted.
-- 
Happy hacking
Petter Reinholdtsen