GLES20 module using wrong native include

[chriscamacho]

in gles20_linux.h

#include <GL/gl.h>

is being used

This works fine in many cases (especially as SDL includes the right file) however while basic GL stuff works like glClearColor, later stuff will fail

error: 'glGetUniformLocation' was not declared in this scope
l_u_0matrix=bbUInt(glGetUniformLocation(bbUInt(l_program),bbCString(bbString(L"MVP",3))));

this can be worked around by using

#import "<GLES2/gl2.h>"

in the main mx2 source, which I think gles20_linux.h should be using....

[chriscamacho]

seems to effect emscripten target too if not using SDL2, but thats a whole other world of pain...