add esid to array/prototype/keys test (#1112)

test/built-ins/Array/prototype/keys/iteration-mutable.js

@@ -1,6 +1,7 @@
 // Copyright (C) 2015 the V8 project authors. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
+esid: sec-array.prototype.keys
 es6id: 22.1.3.13
 description: >
   New items in the array are accessible via iteration until iterator is "done".

test/built-ins/Array/prototype/keys/iteration.js

@@ -1,6 +1,7 @@
 // Copyright (C) 2015 the V8 project authors. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
+esid: sec-array.prototype.keys
 es6id: 22.1.3.13
 description: >
   The return is a valid iterator with the array's numeric properties.

test/built-ins/Array/prototype/keys/length.js

@@ -1,6 +1,7 @@
 // Copyright (C) 2015 the V8 project authors. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
+esid: sec-array.prototype.keys
 es6id: 22.1.3.13
 description: >
   Array.prototype.keys.length value and descriptor.

test/built-ins/Array/prototype/keys/name.js

@@ -1,6 +1,7 @@
 // Copyright (C) 2015 the V8 project authors. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
+esid: sec-array.prototype.keys
 es6id: 22.1.3.13
 description: >
   Array.prototype.keys.name value and descriptor.

test/built-ins/Array/prototype/keys/prop-desc.js

@@ -1,6 +1,7 @@
 // Copyright (C) 2015 the V8 project authors. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
+esid: sec-array.prototype.keys
 es6id: 22.1.3.13
 description: >
   Property type and descriptor.

test/built-ins/Array/prototype/keys/return-abrupt-from-this.js

@@ -1,6 +1,7 @@
 // Copyright (C) 2015 the V8 project authors. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
+esid: sec-array.prototype.keys
 es6id: 22.1.3.13
 description: >
   Return abrupt from ToObject(this value).

test/built-ins/Array/prototype/keys/returns-iterator-from-object.js

@@ -1,6 +1,7 @@
 // Copyright (C) 2015 the V8 project authors. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
+esid: sec-array.prototype.keys
 es6id: 22.1.3.13
 description: >
   Creates an iterator from a custom object.

test/built-ins/Array/prototype/keys/returns-iterator.js

@@ -1,6 +1,7 @@
 // Copyright (C) 2015 the V8 project authors. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
+esid: sec-array.prototype.keys
 es6id: 22.1.3.13
 description: >
   The method should return an Iterator instance.