Introduce builtin intrinsic object to share property values between builtin objects (#3490)

Fixed:
 - Global symbol access
 - Array.prototype.values and Array.prototype[Symbol.iterator] must be the same function object

To test the new functionality arguments object Symbol.iterator property is added.

JerryScript-DCO-1.0-Signed-off-by: Robert Fancsik frobert@inf.u-szeged.hu

jerry-core/ecma/operations/ecma-iterator-object.c

@@ -187,7 +187,7 @@ ecma_op_get_iterator (ecma_value_t value, /**< value to get iterator from */
   if (!has_method)
   {
     /* 2.a */
-    method = ecma_op_get_method_by_symbol_id (value, LIT_MAGIC_STRING_ITERATOR);
+    method = ecma_op_get_method_by_symbol_id (value, LIT_GLOBAL_SYMBOL_ITERATOR);
 
     /* 2.b */
     if (ECMA_IS_VALUE_ERROR (method))