Add missing test for optional chains with undefined receiver

Bug: chromium:1038178
Change-Id: I0c96015817b226368479bf8a384a654e6ed22969
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1987914Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Auto-Submit: Shu-yu Guo <syg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65766}

test/mjsunit/regress/regress-crbug-1038178.js

+// Copyright 2019 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --allow-natives-syntax
+
+function opt(){
+    (new (function(){
+        try{
+            r.c>new class extends(W.y.h){}
+            l.g.e._
+            function _(){}[]=({[l](){}}),c()
+        }catch(x){}
+    }));
+    (((function(){})())?.v)()
+}
+%PrepareFunctionForOptimization(opt)
+assertThrows(opt());
+assertThrows(opt());
+%OptimizeFunctionOnNextCall(opt)
+assertThrows(opt());