Add Array property descriptor test (#2164)

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

@@ -0,0 +1,25 @@
+// Copyright (C) 2019 Aleksey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array-constructor
+description: >
+  Property descriptor of Array
+info: |
+  22.1.1 The Array Constructor
+
+  * is the initial value of the Array property of the global object.
+
+  17 ECMAScript Standard Built-in Objects
+
+  Every other data property described in clauses 18 through 26 and in Annex B.2
+  has the attributes { [[Writable]]: true, [[Enumerable]]: false,
+  [[Configurable]]: true } unless otherwise specified.
+includes: [propertyHelper.js]
+---*/
+
+verifyProperty(this, 'Array', {
+  value: Array,
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});