Ensure we never inline class constructors in Crankshaft, as it currently is entirely unsupported.

test/mjsunit/regress/regress-inline-class-constructor.js

 // Copyright 2015 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
 
-var global = new Object(3);
-function f() {
-  global[0] = global[0] >>> 15.5;
+"use strict";
+
+var B = class extends Int32Array { }
+
+function f(b) {
+  if (b) {
+    null instanceof B;
+  }
 }
 
 f();
 f();
+f();
 %OptimizeFunctionOnNextCall(f);
 f();
+
+function f2() {
+  return new B();
+}
+
+%OptimizeFunctionOnNextCall(f2);
+f2();