Fix typo

Author: Ace Nassri

bigquery/system-test/query.test.js

@@ -13,7 +13,7 @@
 
 'use strict';
 
-var example = require('../sync_query');
+var example = require('../query');
 
 describe('bigquery:query', function () {
   describe('sync_query', function () {

bigquery/test/query.test.js

@@ -40,7 +40,7 @@ function getSample () {
     bigquery: sinon.stub().returns(bigqueryMock)
   };
   return {
-    program: proxyquire('../sync_query', {
+    program: proxyquire('../query', {
       gcloud: gcloudMock
     }),
     mocks: {