Ensure objects emitted in code are allocated in old space.

runtime/vm/object_ia32_test.cc

Index: runtime/vm/object_ia32_test.cc
diff --git a/runtime/vm/object_ia32_test.cc b/runtime/vm/object_ia32_test.cc
index 2c9785087d8ef85ab1c9d74e483421dce466f069..2c28cc1b57a8741be411a370288dc3e751e9df43 100644
--- a/runtime/vm/object_ia32_test.cc
+++ b/runtime/vm/object_ia32_test.cc
@@ -32,7 +32,8 @@ void GenerateIncrement(Assembler* assembler) {
 // Generate a dart code sequence that embeds a string object in it.
 // This is used to test Embedded String objects in the instructions.
 void GenerateEmbedStringInCode(Assembler* assembler, const char* str) {
-  const String& string_object = String::ZoneHandle(String::New(str));
+  const String& string_object =
+      String::ZoneHandle(String::New(str, Heap::kOld));
   __ LoadObject(EAX, string_object);
   __ ret();
 }