iOS: Clean up how samples are added to a project.
iOS: Clean up how samples are added to a project.

--HG--
extra : rebase_source : 0c9be0be1ed4deb4127f18c1f94bf5eaea5a7118

ehsan/ogre,bhlzlx/ogre,bhlzlx/ogre,bhlzlx/ogre,ruleless/ogre,ruleless/ogre,ehsan/ogre,bhlzlx/ogre,ehsan/ogre,ruleless/ogre,bhlzlx/ogre,ehsan/ogre,ruleless/ogre,bhlzlx/ogre,ehsan/ogre,ruleless/ogre,ruleless/ogre