[interpreter] do not serialize bytecode for snapshot.

src/snapshot/serialize.h

Index: src/snapshot/serialize.h
diff --git a/src/snapshot/serialize.h b/src/snapshot/serialize.h
index 7f4676eafa0cb207cc3bb9143ec4077693dddeea..72d265b0cca0fcac5f64ff80b58af623c4a8041c 100644
--- a/src/snapshot/serialize.h
+++ b/src/snapshot/serialize.h
@@ -652,8 +652,11 @@ class StartupSerializer : public Serializer {
                        WhereToPoint where_to_point, int skip) override;
   void SerializeWeakReferencesAndDeferred();
 
+  void Synchronize(VisitorSynchronization::SyncTag tag) override;
+
  private:
   intptr_t root_index_wave_front_;
+  bool serializing_builtins_;
   DISALLOW_COPY_AND_ASSIGN(StartupSerializer);
 };