report descriptor.
This file cannot be written.
Users: HIDAPI library (http://www.signal11.us/oss/hidapi)
+
+What: For USB devices : /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/<hid-bus>:<vendor-id>:<product-id>.<num>/country
+ For BT devices : /sys/class/bluetooth/hci<addr>/<hid-bus>:<vendor-id>:<product-id>.<num>/country
+ Symlink : /sys/class/hidraw/hidraw<num>/device/country
+Date: February 2015
+KernelVersion: 3.19
+Contact: Olivier Gay <ogay@logitech.com>
+Description: When read, this file returns the hex integer value in ASCII
+ of the device's HID country code (e.g. 21 for US).
+ This file cannot be written.