WinRT: Ignore winrtrunner specific arguments

qdevel is an option used from winrtrunner to indicate a specific
environment to the app. QTestLib needs to ignore that parameter similar
to the Visual Studio generated arguments.

Change-Id: I00a3abe19f1e5b4159e65d26050f04e28f40316f
Reviewed-by: Oliver Wolff <oliver.wolff@theqtcompany.com>
Reviewed-by: Andrew Knight <andrew.knight@theqtcompany.com>