COMP: Add DCMTK library paths to build settings

Allows dlls to be found on windows in a build tree.  This is needed
after commit 21914 was committed to address bug 3040.

git-svn-id: http://svn.slicer.org/Slicer4/trunk@21942 3bd1e089-480b-0410-8dfb-8563597acbee