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

Relates to #9380

modules/@angular/compiler/test/i18n/expander_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 {HtmlAttrAst, HtmlElementAst, HtmlTextAst} from '@angular/compiler/src/html_ast';
 import {HtmlParser} from '@angular/compiler/src/html_parser';
 import {ExpansionResult, expandNodes} from '@angular/compiler/src/i18n/expander';

modules/@angular/compiler/test/i18n/i18n_html_parser_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 {Lexer} from '@angular/compiler/src/expression_parser/lexer';
 import {Parser} from '@angular/compiler/src/expression_parser/parser';
 import {HtmlAttrAst, HtmlElementAst, HtmlTextAst} from '@angular/compiler/src/html_ast';

modules/@angular/compiler/test/i18n/message_extractor_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 {Lexer} from '@angular/compiler/src/expression_parser/lexer';
 import {Parser} from '@angular/compiler/src/expression_parser/parser';
 import {HtmlParser} from '@angular/compiler/src/html_parser';

modules/@angular/compiler/test/i18n/message_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 {Message, id} from '@angular/compiler/src/i18n/message';
 import {beforeEach, ddescribe, describe, expect, iit, inject, it, xdescribe, xit} from '@angular/core/testing/testing_internal';
 

modules/@angular/compiler/test/i18n/xmb_serializer_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 {HtmlAst} from '@angular/compiler/src/html_ast';
 import {Message, id} from '@angular/compiler/src/i18n/message';
 import {deserializeXmb, serializeXmb} from '@angular/compiler/src/i18n/xmb_serializer';