[wasm] disable serialization for asm-wasm

test/mjsunit/regress/wasm/regression-643595.js

Index: test/mjsunit/regress/wasm/regression-643595.js
diff --git a/test/mjsunit/regress/wasm/regression-643595.js b/test/mjsunit/regress/wasm/regression-643595.js
new file mode 100644
index 0000000000000000000000000000000000000000..9da074b6899ed429b1e636ee71c2c150456a00bd
--- /dev/null
+++ b/test/mjsunit/regress/wasm/regression-643595.js
@@ -0,0 +1,11 @@
+// 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: --cache=code --validate-asm
+
+(function f() {
+  "use asm";
+  function g() { }
+  return { g: g };
+})();