Doc: Added iOS examples to manifest-meta.qdocconf

Task-number: QTBUG-33593
Change-Id: I7aaa1230d7ed6294ddd5a3db6466894522136393
Reviewed-by: Topi Reiniö <topi.reinio@digia.com>
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>