Fix finding Ogre framework on OS X
Fix finding Ogre framework on OS X

RealityFactory/ogre,paroj/ogre,OGRECave/ogre,RealityFactory/ogre,paroj/ogre,OGRECave/ogre,paroj/ogre,RealityFactory/ogre,OGRECave/ogre,paroj/ogre,OGRECave/ogre,OGRECave/ogre,paroj/ogre,RealityFactory/ogre,RealityFactory/ogre