[serializer] add options to compile eagerly and pre-age for code cache.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 26b927d2e4b68d3f1662806e000e04306737682d..b386ba15a9d132da3c97f63d185946ef15c24b8b 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -5258,6 +5258,7 @@ class Code: public HeapObject {
   static void MakeCodeAgeSequenceYoung(byte* sequence, Isolate* isolate);
   static void MarkCodeAsExecuted(byte* sequence, Isolate* isolate);
   void MakeYoung(Isolate* isolate);
+  void PreAge(Isolate* isolate);
   void MarkToBeExecutedOnce(Isolate* isolate);
   void MakeOlder(MarkingParity);
   static bool IsYoungSequence(Isolate* isolate, byte* sequence);