add the other known lun file path from 2.6.x kernel

this should fix the USB Mass Storage mounting problem on firmwares
> than 3.14 (or 3.16...? don't know, as my device with 3.14 isn't affected)

extendedcommands.c

@@ -505,6 +505,8 @@ int control_usb_storage_for_lun(Volume* vol, bool enable) {
 #ifdef TARGET_USE_CUSTOM_LUN_FILE_PATH
         TARGET_USE_CUSTOM_LUN_FILE_PATH,
 #endif
+		"/sys/devices/platform/fsl-tegra-udc/gadget/lun0/file",
+		"/sys/devices/platform/tegra-udc.0/gadget/lun0/file",
         "/sys/devices/platform/usb_mass_storage/lun%d/file",
         "/sys/class/android_usb/android0/f_mass_storage/lun/file",
         "/sys/class/android_usb/android0/f_mass_storage/lun_ex/file",