USB hotplug connection functionality

[dominikfehr]

Due to several possible problems while detaching the kernel driver from a device, in some cases it is useful to use the usb hotplug event to actually wait for the device to be connected and directly opening it to prevent the system to take over before.

Implementation line might be:

facedancer/facedancer/proxy.py

Line 51 in ae60b53

device_handle = self.proxied_device.open(device, detach=True)

For reference, this way worked perfectly fine for most of my problem cases:
https://github.com/Fehr-GmbH/blackleak/blob/master/main.c#L40