qmljs: track origin of ObjectValues

allows unique identification of types

Change-Id: Id4e6a9c1fa23409b1e2d5eb32708a0bacd04a5da
Reviewed-by: Tim Jenssen <tim.jenssen@digia.com>
Reviewed-by: Fawzi Mohamed <fawzi.mohamed@digia.com>

src/libs/qmljs/qmljsmodelmanagerinterface.h

@@ -142,6 +142,7 @@ public:
     };
 
     typedef QHash<QString, CppData> CppDataHash;
+    typedef QHashIterator<QString, CppData> CppDataHashIterator;
 
 public:
     ModelManagerInterface(QObject *parent = 0);