Silence adduser warning messages

Author: gsingh93

config/rootfs-overlay/etc/rcS.d/S98setup

@@ -3,7 +3,7 @@
 case "$1" in
     start)
         # If the user already exists this won't cause any problems
-        adduser user --disabled-password
+        adduser user --disabled-password 2>/dev/null
 
         mkdir -p /shared
         mount -t 9p -o trans=virtio,version=9p2000.L shared /shared