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

Relates to #9380

modules/@angular/compiler/test/output/output_emitter_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 {CompileIdentifierMetadata} from '@angular/compiler/src/compile_metadata';
 import * as o from '@angular/compiler/src/output/output_ast';
 import {DynamicInstance, InstanceFactory} from '@angular/compiler/src/output/output_interpreter';