[CMake] Bundle Generator conflicts with MACOSX_BUNDLE

[Timothy M. Shead]

Mike Arthur wrote:
> Are you using it with BundleUtilities? If not you should think of how you
> could do, as manually having to run install_name_tool when BundleUtilities is
> available is a bit of a unpleasant proposition.

Yes, this is something I've been contemplating on a low-priority thread. 
  I've added this and your other suggestions to the wiki, no particular 
guarantees on when I'll get to them.

Cheers,
Tim