QmlDesigner: Add plugin directory to the exported directories

Change-Id: If230176bc7e96476e2f748d850a5a4c93b57cafa
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@digia.com>

src/plugins/qmldesigner/qmldesigner_dependencies.pri

@@ -10,6 +10,7 @@ QTC_PLUGIN_DEPENDS += \
     qtsupport \
     projectexplorer
 INCLUDEPATH *= \
+    $$PWD \
     $$PWD/../../../share/qtcreator/qml/qmlpuppet/interfaces \
     $$PWD/designercore \
     $$PWD/designercore/include \