bmx7-dnsupdate: wait 10 secs if bmx7 ins't running

If bmx7 isn't running just yet the folder
`/var/run/bmx7/json/originators` is missing and so the while loop runs
non stop. Now the loop sleeps for 10 seconds if inotifywait fails.

Signed-off-by: Paul Spooren <spooren@informatik.uni-leipzig.de>

utils/bmx7-dnsupdate/files/usr/bin/bmx7-dnsupdate

@@ -25,5 +25,5 @@ while true; do
     killall -HUP dnsmasq
 
     # block until originators changes
-    inotifywait -e create -e delete -q /var/run/bmx7/json/originators/
+    inotifywait -e create -e delete -q /var/run/bmx7/json/originators/ || sleep 10
 done