Support old-space allocation in generated code (bump block only for now).

runtime/vm/code_generator.cc

Index: runtime/vm/code_generator.cc
===================================================================
--- runtime/vm/code_generator.cc	(revision 40518)
+++ runtime/vm/code_generator.cc	(working copy)
@@ -117,7 +117,8 @@
     Exceptions::ThrowArgumentError(error);
   }
 
-  const Array& array = Array::Handle(Array::New(len));
+  Heap::Space space = isolate->heap()->SpaceForAllocation(kArrayCid);
+  const Array& array = Array::Handle(Array::New(len, space));
   arguments.SetReturn(array);
   TypeArguments& element_type =
       TypeArguments::CheckedHandle(arguments.ArgAt(1));
@@ -156,9 +157,9 @@
     }
   }
 #endif
+  Heap::Space space = isolate->heap()->SpaceForAllocation(cls.id());
+  const Instance& instance = Instance::Handle(Instance::New(cls, space));
 
-  const Instance& instance = Instance::Handle(Instance::New(cls));
-
   arguments.SetReturn(instance);
   if (cls.NumTypeArguments() == 0) {
     // No type arguments required for a non-parameterized type.