Add new target support to Function object (#3708)

Added steps 1, 2.c, 3.c, 21, 22 to ecma_op_create_dynamic_function

JerryScript-DCO-1.0-Signed-off-by: Adam Szilagyi aszilagy@inf.u-szeged.hu

tests/jerry/es2015/function-new-target.js

@@ -0,0 +1,32 @@
+// 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 get = [];
+var p = new Proxy(Function, { get: function(o, k) { get.push(k); return o[k]; }});
+new p;
+
+assert(get + '' === "prototype");
+
+var func = function() {}
+var reflect = Reflect.construct(Function, ['a','b','return a+b'], func);
+assert(Object.getPrototypeOf(reflect) == func.prototype);
+
+var o = new Proxy (function f () {}, { get(t,p,r) { if (p == "prototype") { throw 42 }}})
+
+try {
+  Reflect.construct(Function, [], o);
+  assert(false);
+} catch (e) {
+  assert(e === 42);
+}