add qml to the list of tools

It's new in Qt 5.2.0.

Change-Id: Ibb24f1cc82cbd74f4886f512986e1d45f29ae326
Reviewed-by: Liang Qi <liang.qi@digia.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Alan Alpert <aalpert@blackberry.com>