Remove the -no-stl option from configure

Remove the -no-stl option from configure

This was decided on the mailing list. See:
http://lists.qt-project.org/pipermail/development/2012-March/002442.html
http://lists.qt-project.org/pipermail/development/2012-March/002465.html

Change-Id: I7681e5cc743b20f6d4e29d2aea45c50df41a0b98
Reviewed-by: Stephen Kelly <stephen.kelly@kdab.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>
Reviewed-by: Robin Burchell <robin+qt@viroteck.net>
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>