test/socket-tcp: run iptables with -w

Start test
Test is SUID
./socket-tcp-nfconntrack --pidfile=socket-tcp-nfconntrack.pid --outfile=socket-tcp-nfconntrack.out
Another app is currently holding the xtables lock. Perhaps you want to use the -w option?
Signed-off-by: Andrei Vagin <avagin@gmail.com>

test/zdtm/static/socket-tcp.c

@@ -76,7 +76,7 @@ int main(int argc, char **argv)
 		return 1;
 	if (system("iptables -w -A INPUT -i lo -p tcp -m state --state NEW,ESTABLISHED -j ACCEPT"))
 		return 1;
-	if (system("iptables -A INPUT -j DROP"))
+	if (system("iptables -w -A INPUT -j DROP"))
 		return 1;
 #endif