Update nextboot.sh

Test with config copy in script

Author: MiG-41

OS/RootFS/etc/gh/nextboot.sh

@@ -1,3 +1,8 @@
+rm /etc/gh/config
+/usr/bin/usb_mount.sh
+cp /mnt/usb/GoHeishaMonConfig.new /etc/gh/config
+/usr/bin/usb_umount.sh 
+
 reload_config
 /etc/init.d/dropbear start