package/netplug: init script create needed lock directory

Init script use /var/lock/subsys/netplugd but directory
/var/lock/subsys can be missing.

Signed-off-by: Julien Corjon <corjon.j@ecagroup.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
(cherry picked from commit c81c6d8f3d)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/netplug/S29netplug

@@ -11,6 +11,9 @@
 
 # Copyright 2003 Key Research, Inc.
 
+# Create needed directories
+mkdir -p /var/lock/subsys
+
 # Source function library.
 if [ -f /etc/init.d/functions ]; then
 	. /etc/init.d/functions