Changes from Ant 1.9.14 TO Ant 1.9.15

Other changes:

 * The script should now work with Python 3.
   Github Pull Request #96

 * rmic has been removed from Java 15. The task will now throw an
   exception if you try to use it while running Java 15 or newer.

 * a new property ant.tmpdir provides improved control over the
   location Ant uses to create temporary files