tst_qapplication: Fix test for configs without process support

Change-Id: If591183cd246b852821fcf8e354f5247aa7ba373
Reviewed-by: Maurice Kalinowski <maurice.kalinowski@qt.io>

tests/auto/widgets/kernel/qapplication/tst_qapplication.cpp

@@ -189,9 +189,11 @@ public:
 
 void tst_QApplication::initTestCase()
 {
+#if QT_CONFIG(process)
     // chdir to our testdata path and execute helper apps relative to that.
     const QString testdataDir = QFileInfo(QFINDTESTDATA("desktopsettingsaware")).absolutePath();
     QVERIFY2(QDir::setCurrent(testdataDir), qPrintable("Could not chdir to " + testdataDir));
+#endif
 }
 
 void tst_QApplication::sendEventsOnProcessEvents()