Fixed #32545 :  BC issue: JApplication::redirect($url, $message) broken: Message not displayed after redirect: Affecting many extensions

The few lines from here:
https://github.com/joomla/joomla-cms/blob/master/libraries/legacy/application/application.php#L395

Have not been replicated to the backwards compatibility code that is being fixed by this PR.

Tracker issue item:
http://joomlacode.org/gf/project/joomla/tracker/?action=TrackerItemEdit&tracker_item_id=32545

**This is really needed to be fixed in 3.2.0 stable as it affects many extensions that use extensively this redirect method and add messages to it.**

*Actually, it was very convenient, and the change of API of 3.2.0 and corresponding deprecation in 4.0 should be reconsidered in 3.2.1.*