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

Relates to #9380

modules/@angular/core/test/change_detection/change_detector_util_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 {devModeEqual} from '@angular/core/src/change_detection/change_detection_util';
 import {afterEach, beforeEach, ddescribe, describe, expect, iit, it, xit} from '@angular/core/testing/testing_internal';
 

modules/@angular/core/test/change_detection/differs/default_iterable_differ_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 {DefaultIterableDiffer, DefaultIterableDifferFactory} from '@angular/core/src/change_detection/differs/default_iterable_differ';
 import {afterEach, beforeEach, ddescribe, describe, expect, iit, it, xit} from '@angular/core/testing/testing_internal';
 

modules/@angular/core/test/change_detection/differs/default_keyvalue_differ_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 {DefaultKeyValueDiffer, DefaultKeyValueDifferFactory} from '@angular/core/src/change_detection/differs/default_keyvalue_differ';
 import {afterEach, beforeEach, ddescribe, describe, expect, iit, it, xit} from '@angular/core/testing/testing_internal';
 

modules/@angular/core/test/change_detection/differs/iterable_differs_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 {Injector, ReflectiveInjector, provide} from '@angular/core';
 import {IterableDiffers} from '@angular/core/src/change_detection/differs/iterable_differs';
 import {afterEach, beforeEach, ddescribe, describe, expect, iit, it, xit} from '@angular/core/testing/testing_internal';

modules/@angular/core/test/change_detection/iterable.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 {getSymbolIterator} from '../../src/facade/lang';
 
 export class TestIterable {

modules/@angular/core/test/change_detection/util.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 {isBlank} from '../../src/facade/lang';
 
 export function iterableChangesAsString(