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

Relates to #9380

modules/@angular/forms/src/directives/reactive_directives/form_control_directive.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 {Directive, Inject, Input, OnChanges, Optional, Output, Self, SimpleChanges, forwardRef} from '@angular/core';
 
 import {EventEmitter, ObservableWrapper} from '../../facade/async';

modules/@angular/forms/src/directives/reactive_directives/form_control_name.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 {Directive, Host, Inject, Input, OnChanges, OnDestroy, Optional, Output, Self, SimpleChanges, SkipSelf, forwardRef} from '@angular/core';
 
 import {EventEmitter, ObservableWrapper} from '../../facade/async';

modules/@angular/forms/src/directives/reactive_directives/form_group_directive.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 {Directive, Inject, Input, OnChanges, Optional, Output, Self, SimpleChanges, forwardRef} from '@angular/core';
 
 import {EventEmitter, ObservableWrapper} from '../../facade/async';

modules/@angular/forms/src/directives/reactive_directives/form_group_name.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 {Directive, Host, Inject, Input, OnDestroy, OnInit, Optional, Self, SkipSelf, forwardRef} from '@angular/core';
 import {NG_ASYNC_VALIDATORS, NG_VALIDATORS} from '../../validators';
 import {AbstractFormGroupDirective} from '../abstract_form_group_directive';