Change 1: Not all 'modules' in sys.modules have a
    sensible __file__ attribute. Some of our java package
    can have the __file__ attribute set to None.

    Change 2: In jython we have the jython license file in
    <root> and the CPython license file in <root>/Lib. By
    reversing the search sequence jython will find and
    show the jython license file before the CPython file.

Closes SF patch #405853.