Host: Add convenience parameter for serial_number for device creation.
Host: Add convenience parameter for serial_number for device creation.

dominicgs/GreatFET-experimental,greatscottgadgets/greatfet,dominicgs/GreatFET-experimental,greatscottgadgets/greatfet,greatscottgadgets/greatfet,dominicgs/GreatFET-experimental,greatscottgadgets/greatfet