Fix vm code base so that it can be built for --arch=simarm (no snapshot yet).

runtime/vm/assembler_test.cc

Index: runtime/vm/assembler_test.cc
===================================================================
--- runtime/vm/assembler_test.cc	(revision 17245)
+++ runtime/vm/assembler_test.cc	(working copy)
@@ -1,4 +1,4 @@
-// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
@@ -10,6 +10,8 @@
 
 namespace dart {
 
+#if defined(TARGET_ARCH_IA32) || defined(TARGET_ARCH_X64)
+
 ASSEMBLER_TEST_EXTERN(StoreIntoObject);
 
 ASSEMBLER_TEST_RUN(StoreIntoObject, entry) {
@@ -75,4 +77,6 @@
       GrowableObjectArray::data_offset() - kHeapObjectTag));
 }
 
+#endif
+
 }  // namespace dart