Continue working on realms (#4356)

- Rework symbols to have the same value across realms
- Support realms for native functions
- Support test262
- Use new.target realms for constructing intrinsics

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com

tests/jerry/es.next/realms4.js

@@ -0,0 +1,35 @@
+// 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 realm = createRealm()
+
+function compare(a, b)
+{
+  assert (a === b)
+  assert (typeof a === "symbol")
+  assert (typeof b === "symbol")
+}
+
+compare(Symbol.asyncIterator, realm.Symbol.asyncIterator)
+compare(Symbol.hasInstance, realm.Symbol.hasInstance)
+compare(Symbol.isConcatSpreadable, realm.Symbol.isConcatSpreadable)
+compare(Symbol.iterator, realm.Symbol.iterator)
+compare(Symbol.match, realm.Symbol.match)
+compare(Symbol.replace, realm.Symbol.replace)
+compare(Symbol.search, realm.Symbol.search)
+compare(Symbol.species, realm.Symbol.species)
+compare(Symbol.split, realm.Symbol.split)
+compare(Symbol.toPrimitive, realm.Symbol.toPrimitive)
+compare(Symbol.toStringTag, realm.Symbol.toStringTag)
+compare(Symbol.unscopables, realm.Symbol.unscopables)