[wasm] test deserialization when header is invalid

src/snapshot/code-serializer.h

Index: src/snapshot/code-serializer.h
diff --git a/src/snapshot/code-serializer.h b/src/snapshot/code-serializer.h
index 6577df8c855cc0f1ff8d4c4b4c118222b4a7fc01..67dd854790dec8f9783ba02e24045e30f6fad147 100644
--- a/src/snapshot/code-serializer.h
+++ b/src/snapshot/code-serializer.h
@@ -113,6 +113,7 @@ class SerializedCodeData : public SerializedData {
   Vector<const uint32_t> CodeStubKeys() const;
 
   static uint32_t SourceHash(Handle<String> source);
+  static void InvalidateVersionForTest(byte* buffer, size_t buffer_size);
 
  private:
   explicit SerializedCodeData(ScriptData* data);