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);