When instantiate a template with anonymous class/struct/union
AnonymousNameId has to be cloned.

Task-number: QTCREATORBUG-9227

Change-Id: Iedca5e41589e68a94a35cd4387241052c70c50df
Reviewed-by: Sergey Shambir <sergey.shambir.auto@gmail.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>