[CMake] DragNDrag hdiutil debug help

[Brad King]

On 10/18/2016 10:32 AM, Cralle, Chris wrote:
> I need output from the hdiutil command at CPackDragNDropGenerator.cxx:258
> 
> I wish it was more like CPackOSXX11Generator/CPackPackageMakerGenerator
> which saves to hdiutilOutput.log

That sounds useful.  If you'd like to try adding it please see
CONTRIBUTING.rst at the top of our source tree in Git `master`.

> And as an added bonus if there was a CMake option to enable -debug on
> hdiutil, that would be awesome.

If all the output is captured to a log file is there any reason not to
just always add the -debug flag?

Thanks,
-Brad