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

Relates to #9380

modules/@angular/router/src/directives/router_link.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 {LocationStrategy} from '@angular/common';
 import {Directive, HostBinding, HostListener, Input, OnChanges} from '@angular/core';
 

modules/@angular/router/src/directives/router_link_active.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 {AfterContentInit, ContentChildren, Directive, ElementRef, Input, OnChanges, OnDestroy, QueryList, Renderer} from '@angular/core';
 import {Subscription} from 'rxjs/Subscription';
 

modules/@angular/router/src/directives/router_outlet.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 {Attribute, ComponentFactory, ComponentRef, Directive, ReflectiveInjector, ResolvedReflectiveProvider, ViewContainerRef} from '@angular/core';
 import {RouterOutletMap} from '../router_outlet_map';
 import {ActivatedRoute} from '../router_state';