BUG: Fix python wrapping on Windows

The vtkWrapPython.exe command lines for the *PythonD targets were too
long (>35K characters. A "bad number" error was generated.

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23132 3bd1e089-480b-0410-8dfb-8563597acbee