COMP: Add install SimpleITK library to fixup into bundle

_SimpleITK*.so has been added to the list of libraries to be fixed up
in fixup_bundle_with_plugins method. It is also added to
gp_item_default_embedded_path_override method, because ?

From: Steve Pieper <pieper@isomics.com>

git-svn-id: http://svn.slicer.org/Slicer4/trunk@22092 3bd1e089-480b-0410-8dfb-8563597acbee