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

Relates to #9380

modules/@angular/compiler-cli/test/mocks.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 * as ts from 'typescript';
 
 import {ReflectorHost, ReflectorHostContext} from '../src/reflector_host';

modules/@angular/compiler-cli/test/reflector_host_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 {beforeEach, ddescribe, describe, expect, iit, it} from '@angular/core/testing/testing_internal';
 import * as ts from 'typescript';
 

modules/@angular/compiler-cli/test/static_reflector_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 {StaticReflector, StaticReflectorHost, StaticSymbol} from '@angular/compiler-cli/src/static_reflector';
 import {animate, group, keyframes, sequence, state, style, transition, trigger} from '@angular/core';
 import {beforeEach, ddescribe, describe, expect, iit, it} from '@angular/core/testing/testing_internal';