Info to Usb - Copy logs and diagnostic info to USB storage on insert

This is a simple mod to usbmount to gather debug information for cases where you can't
SSH into the box.   If a USB storage (or sdcard) is inserted and it has a directory called
  getlogs
then a script will copy the xbmc logs to the directory as well as some info about the device
from a script called /usr/bin/diag.sh