[CMake] XCode automatic dependencies

[Bill Hoffman]

> Not yet, but Ogre (http://www.ogre3d.org/) officially supports the
> iPhone in their new version (available from SVN only for now). They
> successfully use cmake to generate build environments for all their
> platforms, including the iPhone. It involves settings some xcode
> variables, and explicitly enabling the iPhone build in a cmake option.
> 

Sounds good, if you do get it working, please consider updating the 
wiki, or if you contact the ogre3d developers at any point ask them. 
Are there any ogre3d folks on this list???

-Bill