Add version of x64 FastCloneShallowArrayStub that copies all boilerplate kinds

src/ia32/full-codegen-ia32.cc

Index: src/ia32/full-codegen-ia32.cc
diff --git a/src/ia32/full-codegen-ia32.cc b/src/ia32/full-codegen-ia32.cc
index 10a3422ea1d429f899bd4ee8ae056e1ee244ee31..aa70dcb16b19aa77d47382f2c9e640bfb167d238 100644
--- a/src/ia32/full-codegen-ia32.cc
+++ b/src/ia32/full-codegen-ia32.cc
@@ -1477,6 +1477,10 @@ void FullCodeGenerator::VisitArrayLiteral(ArrayLiteral* expr) {
   int length = subexprs->length();
   Handle<FixedArray> constant_elements = expr->constant_elements();
   ASSERT_EQ(2, constant_elements->length());
+#if DEBUG
+  ElementsKind constant_elements_kind =
+      static_cast<ElementsKind>(Smi::cast(constant_elements->get(0))->value());
+#endif
   Handle<FixedArrayBase> constant_elements_values(
       FixedArrayBase::cast(constant_elements->get(1)));