nfs-utils: Create missing directory sm.bak

Signed-off-by: Maxime Hadjinlian <maxime.hadjinlian@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/nfs-utils/S60nfs

@@ -10,6 +10,7 @@
 
 mkdir -p /var/lock/subsys
 mkdir -p /run/nfs/sm
+mkdir -p /run/nfs/sm.bak
 touch /run/nfs/rmtab
 
 start() {