Caught up with trunk again.
Not yet tested beside compiling (quick test failed, but seems like nothing from the new changes).
git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/branches/ogl-es@6117 dfc29bdd-3216-0410-991c-e03cc46cb475
Adapting both GLES drivers to new addHighLevelShaderMaterial interfaces.
git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/branches/ogl-es@5890 dfc29bdd-3216-0410-991c-e03cc46cb475