Add missing assert entry in case of static super assignment (#3462)

In case of static super member assignments there was a missing
check to validate if the CBC opcode is of CBC_EXT_PUSH_STATIC_SUPER.

Fixes: #3458

JerryScript-DCO-1.0-Signed-off-by: Peter Gal pgal.u-szeged@partner.samsung.com

tests/jerry/es2015/regression-test-issue-3458.js

@@ -0,0 +1,28 @@
+// 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 Animal {}
+class Dog extends Animal {
+  static explain () {
+    super.f = 8
+  }
+}
+
+assert (Dog.f === undefined);
+assert (Animal.f === undefined);
+
+Dog.explain ()
+
+assert (Animal.f === undefined);
+assert (Dog.f === 8);