Samples: PBR - allow shader upgrading on GL3+/OSX
Samples: PBR - allow shader upgrading on GL3+/OSX

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