AutoTest: Allow arguments for test runs

Arguments specified for run configurations were
ignored so far, but sometimes it might help to process
them. Add the possibility and a respective setting
to be able to pass arguments to the test run.

Task-number: QTCREATORBUG-17630
Change-Id: Ie64b784e8477efa02f50ce6b4cf3e55864952880
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@qt.io>
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>

src/plugins/autotest/testsettings.h

@@ -48,6 +48,7 @@ struct TestSettings
     bool limitResultOutput = true;
     bool autoScroll = true;
     bool filterScan = false;
+    bool processArgs = false;
     QHash<Core::Id, bool> frameworks;
     QStringList whiteListFilters;
 };