The host variant of python-pyusb will be neded for Snagboot, so it is
enabled with this commit. In addition, we're adding a very simple test
case to validate that host-python-pyusb minimally works.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Julien Olivain <ju.o@free.fr>
