Update "arguments" and "caller" properties of function object to conform ES6 changes (#3530)

This patch resolves #3393.

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

tests/jerry/es2015/function-arguments-caller.js

@@ -0,0 +1,47 @@
+// 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.
+
+var props = ['arguments', 'caller'];
+
+function f_simple () {
+}
+
+function f_strict () {
+  "use strict";
+}
+
+for (let prop of props) {
+  try {
+    Function.prototype[prop];
+    assert(false);
+  } catch (e) {
+    assert(e instanceof TypeError);
+  }
+
+  assert(f_simple[prop] === null);
+
+  try {
+    f_strict[prop];
+    assert(false);
+  } catch (e) {
+    assert(e instanceof TypeError);
+  }
+
+  let desc = Object.getOwnPropertyDescriptor(f_simple, prop);
+  assert(desc.value === null);
+  assert(desc.writable === false);
+  assert(desc.enumerable === false);
+  assert(desc.configurable === false);
+  assert(Object.getOwnPropertyDescriptor(f_strict, prop) === undefined);
+}