First changes for ogl-es without egl for iPhone.
Submitted by grafikrobot.
git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/branches/ogl-es@2019 dfc29bdd-3216-0410-991c-e03cc46cb475
Added initial ogl-es extension support with function pointers. Not yet working due to pointer problems...
git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/branches/ogl-es@1983 dfc29bdd-3216-0410-991c-e03cc46cb475