supertuxkart: new package

supertuxkart: new package

Note that this package builds and bundles a number of libraries,
such as GLEW and Irrlicht. We are not interested in doing
non-upstreamable changes, so it is not desirable to modify
this choice in any way.

In addition, Supertuxkart builds a version of the angelscript
interpreter. If a compatible version of angelscript is installed
on the system, it's possible to use it.

[Peter: DOS newlines for 0002 patch, tweak comment header]
Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>