CDB: fix breakpoint location in catch clauses.

Task-number: QTCREATORBUG-7336

Change-Id: I926e82499325e4fe38e25cc7a6158050f7fc0e82
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>
Reviewed-by: Eike Ziller <eike.ziller@digia.com>
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>