Again changed to pass usb file descriptor

As experiments continue, I visit this technique again.
But instead of using the file descriptor as tty device,
now using it to make a libusb_device. This could help us
in talking with the usb device after appropriate permissions
are taken. Crossed fingers.

Signed-off-by: Venkatesh Shukla <venkatesh.shukla.eee11@iitbhu.ac.in>