SharedLibraryLoader subproject

[PokeMMO]

Instead of having two implementations SharedLibraryLoader and JniGenSharedLibraryLoader we should probably unify to a single implementation with no other dependencies.

A quick example would be PokeMMO@c9c41d3

This would be a slightly breaking change for libgdx as a whole, which replaces GdxRuntimeExceptions with regular RuntimeExceptions. (Or potentially a new custom typed JnigenRuntimeException)

Would this exception class change be an issue?

Edit: I guess we could also just move GdxRuntimeException to this instead of gdx base. I don't really like that idea, but it would work and not break anything.

[Tom-Ski]

A local clone of GdxRuntimeException? Or move it out of gdx core to here?

[MobiDevelop]

I'd think a new specific runtime exception would be fine.