Does not run on FreeBSD

[mkohanim]

../src/node_usb.cc:36:5: error: use of undeclared identifier 'libusb_interrupt_event_handler'
npm ERR! libusb_interrupt_event_handler(usb_context);
npm ERR! ^
npm ERR! ../src/node_usb.cc:85:36: error: use of undeclared identifier 'LIBUSB_OPTION_LOG_LEVEL'
npm ERR! libusb_set_option(usb_context, LIBUSB_OPTION_LOG_LEVEL, info[0].AsNapi::Number().Int32Value());
npm ERR! ^
npm ERR! ../src/node_usb.cc:94:36: error: use of undeclared identifier 'LIBUSB_OPTION_USE_USBDK'
npm ERR! libusb_set_option(usb_context, LIBUSB_OPTION_USE_USBDK);