Change hash table capacity heuristics when serializing.

src/heap/heap.cc

Index: src/heap/heap.cc
diff --git a/src/heap/heap.cc b/src/heap/heap.cc
index 50a328a714411a43f110b48f369deb9d11d71d0f..b6a061c03c64c030518c9e8bb280ac0f76c6c7c7 100644
--- a/src/heap/heap.cc
+++ b/src/heap/heap.cc
@@ -3096,7 +3096,7 @@ void Heap::CreateInitialObjects() {
                           TENURED));
 
   Handle<SeededNumberDictionary> slow_element_dictionary =
-      SeededNumberDictionary::New(isolate(), 0, TENURED);
+      SeededNumberDictionary::New(isolate(), 1, TENURED);
   slow_element_dictionary->set_requires_slow_elements();
   set_empty_slow_element_dictionary(*slow_element_dictionary);