dnsmasq: rewrite config on host name modification

If the hostname in /etc/config/system is modified the dnsmasq should also
get triggered to rewrite/reload the config.

Signed-off-by: Florian Eckert <fe@dev.tdt.de>

package/network/services/dnsmasq/files/dnsmasq.init

@@ -1044,7 +1044,7 @@ dnsmasq_stop()
 
 service_triggers()
 {
-	procd_add_reload_trigger "dhcp"
+	procd_add_reload_trigger "dhcp" "system"
 	procd_add_raw_trigger "interface.*" 2000 /etc/init.d/dnsmasq reload
 }