qt-4.5.0 license change to include LGPLv2

[Rex Dieter]

With qt-4.5.0 final release today, QtSoftware has implemented the
planned licensing change to include LGPLv2.  In practical fedora
packaging/license terms, qt went from
License: GPLv3 with exceptions or GPLv2 with exceptions
to
License: GPLv3 with exceptions or LGPLv2 with exceptions
which is more permissive.

See also:
http://www.qtsoftware.com/products/licensing

-- Rex