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

Relates to #9380

modules/@angular/compiler-cli/src/main.ts

@@ -1,4 +1,12 @@
 #!/usr/bin/env node
+/**
+ * @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
+ */
+
 
 // Must be imported first, because angular2 decorators throws on load.
 import 'reflect-metadata';