fix #2343 (#2349)

Co-authored-by: dylan.wang <dylan.wang@yijinin.com>

tools/goctl/rpc/generator/etc.tpl

@@ -1,5 +1,5 @@
 Name: {{.serviceName}}.rpc
-ListenOn: 127.0.0.1:8080
+ListenOn: 0.0.0.0:8080
 Etcd:
   Hosts:
   - 127.0.0.1:2379