[GLES2] Moved fog to vertex shader from fragment (should be slightly faster, and may improved fog in OpenMW)
[GLES2] Moved fog to vertex shader from fragment (should be slightly faster, and may improved fog in OpenMW)

ptitSeb/glshim,ptitSeb/gl4es,ptitSeb/glshim,ptitSeb/glshim,ptitSeb/gl4es,ptitSeb/glshim,ptitSeb/gl4es,ptitSeb/gl4es