mac mkspecs are really noisy without it now, which makes the tests fail.

Change-Id: I6b4900c51d0b8aedd9309482a30055e48c3b9f69
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@digia.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>