COMP: Make Python resources depend on qrcc.py

Tweak the build rules for Python resource scripts to depend on the
qrcc.py script that generates them. This should ensure that they are
regenerated if the generation script changes. (In particular, it is
hoped that this will help squash lingering issues in various folks'
builds re: r23300.)

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23311 3bd1e089-480b-0410-8dfb-8563597acbee