[wasm][asm.js] Fail sooner if eval is present.

test/mjsunit/asm/regress-672045.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: --validate-asm --allow-natives-syntax
+
+function Module(stdlib, env) {
+  "use asm";
+  var x = env.bar|0;
+  return { foo: function(y) { return eval(1); } };

[titzer, 2016/12/08 14:16:38]

Do you want to pull this function literal out to be more asmy?

[bradn, 2016/12/08 14:26:42]

Pulled out it doesn't tickle the issue, as then other cases catch it first.

+}
+Module(this, {bar:0});
+assertTrue(%IsNotAsmWasmCode(Module));