!2962 Modify NewSecondWorker problems of test cases

Merge pull request !2962 from hyq5234/master

compileruntime/worker_lib_standard/src/main/js/default/workers/worker_009.js

@@ -17,6 +17,7 @@ import worker from "@ohos.worker"
 const parentPort = worker.parentPort;
 
 var ss = undefined;
+var flag = false;
 
 parentPort.onmessage = function(e) {
   let data = e.data;