chore(lint): Added license headers to most TypeScript files

Relates to #9380

modules/@angular/platform-browser-dynamic/test/xhr/xhr_cache_setter.ts

@@ -1,3 +1,11 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
 export function setTemplateCache(cache: any /** TODO #9100 */): void {
   (<any>window).$templateCache = cache;
 }

modules/@angular/platform-browser-dynamic/test/xhr/xhr_cache_spec.ts

@@ -1,3 +1,11 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
 import {UrlResolver, XHR} from '@angular/compiler';
 import {Component, provide} from '@angular/core';
 import {beforeEach, beforeEachProviders, ddescribe, describe, iit, inject, it, xit} from '@angular/core/testing/testing_internal';

modules/@angular/platform-browser-dynamic/test/xhr/xhr_impl_spec.ts

@@ -1,3 +1,11 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
 import {AsyncTestCompleter, beforeEach, ddescribe, describe, expect, iit, inject, it, xit} from '@angular/core/testing/testing_internal';
 
 import {PromiseWrapper} from '../../src/facade/async';