Only the original one is implemented so far, but at least
in theory backends for retrieving data from cmake can now
be switched at runtime.
Change-Id: Id73a81c7d40f078be95defd30a38511dca3a3720
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>
Reviewed-by: Eike Ziller <eike.ziller@qt.io>
