- Exclude EGL code from OpenGL ES driver files. This is first step for improve Android device support.

WARNING: This commit is pushed out only for development reason. It may break temporary devices other than Android. Android device improve process will be completed in next 1-3 commits.

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code@4588 dfc29bdd-3216-0410-991c-e03cc46cb475