Bug#675929: Bug #675929 SONAME change

[Aron Xu]

retitle 675929 need to change library name as SONAME changed
thanks

So the previous naming of the package is problematic, the old one
should be libirrlicht1.7a.2 or libirrlicht1.7a2, so it can reflect the
actual SONAME. This time it should be libirrlicht1.7a.3 or
libirrlicht1.7a3, choosing which is up to maintainer's choice.

Then there is a very small transition - only a sourceful upload of
supertux is needed.

-- 
Regards,
Aron Xu