[GCC-XML] patch cableswig to use system expat

[Brad King]

Steve M. Robbins wrote:
> Please point me to the right place for cableswig discussions, if this
> is not it.

Sicne CableSwig is supported only for wrapping ITK, please bring
discussion to the ITK users list:

  http://www.itk.org/mailman/listinfo/insight-users

Thanks,
-Brad