Wait for syslog when installing tox

src/freedombone-app-tox

 
     systemctl restart tox-bootstrapd.service
 
-    TOX_PUBLIC_KEY=$(cat /var/log/syslog | grep tox | grep "Public Key" | awk -F ' ' '{print $8}' | tail -1)
+    sleep 3
+
+    TOX_PUBLIC_KEY=$(cat /var/log/syslog | grep tox | grep "Public Key" | tail -n 1 | awk -F ' ' '{print $8}')
     if [ ${#TOX_PUBLIC_KEY} -lt 30 ]; then
         echo $'Could not obtain the tox node public key'
         exit 6529