test: suppress simple/test-dgram-pingpong chatter

test/simple/test-dgram-pingpong.js

@@ -27,6 +27,7 @@ var assert = require('assert');
 var Buffer = require('buffer').Buffer;
 var dgram = require('dgram');
 
+var debug = false;
 var tests_run = 0;
 
 function pingPongTest(port, host) {
@@ -36,7 +37,7 @@ function pingPongTest(port, host) {
   var sent_final_ping = false;
 
   var server = dgram.createSocket('udp4', function(msg, rinfo) {
-    console.log('server got: ' + msg +
+    if (debug) console.log('server got: ' + msg +
                            ' from ' + rinfo.address + ':' + rinfo.port);
 
     if (/PING/.exec(msg)) {
@@ -61,7 +62,7 @@ function pingPongTest(port, host) {
         client = dgram.createSocket('udp4');
 
     client.on('message', function(msg, rinfo) {
-      console.log('client got: ' + msg +
+      if (debug) console.log('client got: ' + msg +
                              ' from ' + rinfo.address + ':' + rinfo.port);
       assert.equal('PONG', msg.toString('ascii'));