Remove the usage of deprecated functions

Because of 8a48d66da999d99dac4e9217542c5f954450ddb4 in qtbase, and we
don't support Windows XP any more.

Change-Id: Ic68e9ec1aaeb974959958aab1ae3c3a4814d561f
Reviewed-by: Andy Shaw <andy.shaw@qt.io>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>