test: add common.platformTimeout() to dgram test

Use common.platformTimeout() to mitigate potential for CI to timeout on slower devices. Ref: #4937 PR-URL: #4938 Reviewed-By: James M Snell <[email protected]> Reviewed-By: Myles Borins <[email protected]> Reviewed-By: Colin Ihrig <[email protected]>

Author: Trott

test/parallel/test-dgram-send-empty-buffer.js

@@ -1,16 +1,13 @@
 'use strict';
-varcommon=require('../common');
-
-vardgram=require('dgram');
-varclient,timer,buf;
+constcommon=require('../common');
+constdgram=require('dgram');
 
 if(process.platform==='darwin'){
 console.log('1..0 # Skipped: because of 17894467 Apple bug');
 return;
 }
 
-
-client=dgram.createSocket('udp4');
+constclient=dgram.createSocket('udp4');
 
 client.bind(common.PORT);
 
@@ -19,9 +16,9 @@ client.on('message', function(buffer, bytes){
 client.close();
 });
 
-buf=newBuffer(0);
+constbuf=newBuffer(0);
 client.send(buf,0,0,common.PORT,'127.0.0.1',function(err,len){});
 
-timer=setTimeout(function(){
+consttimer=setTimeout(function(){
 thrownewError('Timeout');
-},200);
+},common.platformTimeout(200));