Ensure that ecma_builtin_json_str_helper uses [[DefineOwnProperty]] internal method (#2665)

This patch fixes #2652 and fixes #2653 as well, also reverts #2521.
Related part of the standard ECMAScript v5.1 15.12.3.10.

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

tests/jerry/regression-test-issue-2652-2653.js

@@ -0,0 +1,17 @@
+// Copyright JS Foundation and other contributors, http://js.foundation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+Object.defineProperty (Object.prototype, "", { 'set' : function () { throw ReferenceError ("") } });
+assert (JSON.stringify () === undefined);
+print (JSON.stringify ());