Allow lazy parsing of eval-created functions

test/mjsunit/preparse-toplevel-strict-eval.js

 // Copyright 2016 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: --min-preparse-length=0
 
 "use strict";
-{
-  let one = () => {
-    return "example.com";
-  };
+var x = 1;
+var g = eval("var y = 100; function h(s) { if (s) x = s; return x+y; }; h");
 
-  let two = () => {
-    return one();
-  };
-
-  assertEquals("example.com", two());
-}
+assertEquals(101, g());
+assertEquals(102, g(2));
+assertEquals(102, g(2));