Add svc.clusterset.local example to demo

There was no prior example demonstrating this functionality in make demo.

Signed-off-by: kahirokunn <okinakahiro@gmail.com>

Author: kahirokunn

demo/demo.sh

@@ -78,6 +78,7 @@ desc "Now grab the multi-cluster VIP from the serviceimport..."
 run "${k1} get serviceimport -n demo -o go-template --template='{{index (index .items 0).spec.ips 0}}{{\"\n\"}}'"
 desc "...and connect to it"
 run "${k1} -n demo run -i --rm --restart=Never --image=jeremyot/request:0a40de8 request -- --duration=10s --address=${vip}"
+run "${k1} -n demo run -i --rm --restart=Never --image=jeremyot/request:0a40de8 request -- --duration=10s --address=serve.demo.svc.clusterset.local"
 desc "We have a multi-cluster service!"
 desc "See for yourself"
 desc "Cluster 1: kubectl --kubeconfig ${kubeconfig1} -n demo"