Qmldesigner.Test: fix plugin path

Change-Id: I159886b1b487b3bf085d0ceab64ed0f075ea8833
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@nokia.com>

tests/auto/qml/qmldesigner/coretests/tst_testcore.cpp

@@ -133,9 +133,9 @@ void tst_TestCore::initTestCase()
    // Load plugins
 
 #ifdef Q_OS_MAC
-    const QString pluginPath = QTCREATORDIR "/bin/Qt Creator.app/Contents/PlugIns/QmlDesigner";
+    const QString pluginPath = QTCREATORDIR "/bin/Qt Creator.app/Contents/PlugIns/QtCreator/QmlDesigner";
 #else
-    const QString pluginPath = QTCREATORDIR "/lib/qmldesigner";
+    const QString pluginPath = QTCREATORDIR "/lib/qtcreator/qmldesigner";
 #endif
 
     qDebug() << pluginPath;