setup.py: install included .defs files into DEFS_INCLUDE_DIR
setup.py: install included .defs files into DEFS_INCLUDE_DIR

GNOME/pygtk,nzjrs/pygtk,amremam2004/pygtk,GNOME/pygtk,nzjrs/pygtk,GNOME/pygtk,Distrotech/pygtk,nzjrs/pygtk,Distrotech/pygtk,amremam2004/pygtk,amremam2004/pygtk,Distrotech/pygtk