Fix QLocalePrivate object leaking

Set ref count to zero in QLocalePrivate::create() to avoid QLocalePrivate
object leaking.

Change-Id: I8948c27d59b2038266ab04c6113610b9b4481b45
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Lars Knoll <lars.knoll@digia.com>