usb1: Fix asynchronous control transfer buffer.
usb1: Fix asynchronous control transfer buffer.

Data received from device does not reach the user-visible buffer, and
vice-versa: slicing a bytearray makes a copy. Use a memoryview instead.
Also, wrap python2.7 memoryview so it both produces and accepts integers,
like when bytearay is directly used.

vpelletier/python-libusb1,vpelletier/python-libusb1