[osg-submissions] Fix for provided XCode project

[Stephan Huber]

Robert Osfield schrieb:
> Hi Stephan,
> 
> Do you do have write permission on the XCode project directory?  Is
> there something specifically you aren't able to do?

Ah, you are right! I thought I have only write permissions to the
OpenSceneGraph.xcodeproj directory.

So, disregard my mail, I'll check the stuff in when openscenegraph.org
is available again.

cheers,
Stephan