allow gles+gles2 linking at the same time

This is a bit more messy so sending out separately. Basically this allows to get rid of GLES compile-time selection, as there are games that use both GLESv1 and v2 (although I'm not 100% sure as the module is not yet working - it's Osmos, what I'm sure is that it's statically linked to symbols from both libs).

In either case it's much more convenient to have just single binary, all modules still work on 
Pandora (can't test on Nxx) and another wip GLES2 module (only shows title screen)  wonks after with this too.