suricata: change dir to / in daemon mode.

By changing directory to /, we will not block the directory where
suricata has been started.

src/util-daemon.c

@@ -133,6 +133,8 @@ void Daemonize (void) {
             exit(EXIT_FAILURE);
         } */
 
+        chdir("/");
+
         SetupLogging();
 
         /* Child is ready, tell its parent */