Minor change to docs.


git-svn-id: http://svn.code.sf.net/p/irrlicht/code/branches/ogl-es@4676 dfc29bdd-3216-0410-991c-e03cc46cb475
Clarify android documentation some more.


git-svn-id: http://svn.code.sf.net/p/irrlicht/code/branches/ogl-es@4677 dfc29bdd-3216-0410-991c-e03cc46cb475