Add symbol primitive test

test/built-ins/Object/getOwnPropertyDescriptor/primitive-symbol.js

@@ -0,0 +1,25 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-object.getownpropertydescriptor
+description: >
+  Symbol primitive as first argument is coerced to object.
+info: |
+  Object.getOwnPropertyDescriptor ( O, P )
+
+  1. Let obj be ? ToObject(O).
+  [...]
+  3. Let desc be ? obj.[[GetOwnProperty]](key).
+  4. Return FromPropertyDescriptor(desc).
+
+  Properties of Symbol Instances
+
+  Symbol instances are ordinary objects that inherit properties from the Symbol prototype object.
+  Symbol instances have a [[SymbolData]] internal slot.
+  The [[SymbolData]] internal slot is the Symbol value represented by this Symbol object.
+features: [Symbol]
+---*/
+
+assert.sameValue(Object.getOwnPropertyDescriptor(Symbol(), 'foo'), undefined);
+assert.sameValue(Object.getOwnPropertyDescriptor(Symbol('foo'), 'description'), undefined);