QVectors can be compared for equality, so qHash should be overloaded, too. [ChangeLog][QtCore][QVector] Added qHash(QVector). Change-Id: I2aacce55d416abf2492631a504a02c6e8fc4ff1c Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>