fixed commented parameternames

When working with FBOs I noticed that on iOS there is an issue concerning framebuffer ids where the default id is not 0(should be according to gl-spec). So I need GL_FRAMEBUFFER_BINDING to determine the default renderbuffer at startup. Not sure why these were left out so far.

A lot functions in the ogl-exports have a strange #ifndef HX_LINUX that obviously gets in the way when compiling for Linux. I removed them and my demos compiled out of the box.