Re-target for ES.Next (#3901)

A list of changes:
- 'es2015-subset' profile is deprecated, and an 'es.next' profile is added.
- The default profile is changed to 'es.next'
- Renamed the JERRY_ES2015 guard to JERRY_ESNEXT
- Renamed JERRY_ES2015_BUILTIN_* guards to JERRY_BUILTIN_*
- Moved es2015 specific tests to a new 'es.next' subdirectory
- Updated docs, targets, and test runners to reflect these changes

Resolves #3737.

JerryScript-DCO-1.0-Signed-off-by: Dániel Bátyai dbatyai@inf.u-szeged.hu

tests/jerry/es.next/instanceof-symbol-hasinstance-class.js

@@ -0,0 +1,50 @@
+/* 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.
+ */
+
+class NoParent {
+  static [Symbol.hasInstance] (arg) {
+    return false;
+  }
+}
+
+var obj = new NoParent ();
+
+assert ((obj instanceof NoParent) === false);
+
+class PositiveNumber {
+  static [Symbol.hasInstance] (arg) {
+    return (arg instanceof Number) && (arg >= 0);
+  }
+}
+
+var num_a = new Number (33);
+var num_b = new Number (-50);
+
+assert ((num_a instanceof PositiveNumber) === true);
+assert ((num_b instanceof PositiveNumber) === false);
+
+
+class ErrorAlways {
+  static [Symbol.hasInstance] (arg) {
+    throw new URIError("ErrorAlways");
+  }
+}
+
+try {
+  (new Object ()) instanceof ErrorAlways;
+  assert (false);
+} catch (ex) {
+  assert (ex instanceof URIError);
+}