Fix code completion for operator '->' when
returned value is a pointer of typedef(e.g.:std::auto_ptr).
Included unit test.

Task-number: QTCREATORBUG-629
Change-Id: I36b53a3f80b3c99d52791e18ad1244923c1373f6
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>