Move assert.h/assert.cc from runtime/vm to runtime/platform

runtime/vm/code_generator_x64_test.cc

Index: runtime/vm/code_generator_x64_test.cc
diff --git a/runtime/vm/code_generator_x64_test.cc b/runtime/vm/code_generator_x64_test.cc
index 51a62bc4fbbd8913d1fedb99003ccb841a3ff8c5..6dd10fada7b057498b10c8ae905bc84850010035 100644
--- a/runtime/vm/code_generator_x64_test.cc
+++ b/runtime/vm/code_generator_x64_test.cc
@@ -1,16 +1,15 @@
-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
+// Copyright (c) 2012, 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.
 
+#include "platform/assert.h"
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_X64)
 
-#include "vm/code_generator.h"
-
 #include "vm/ast.h"
 #include "vm/assembler.h"
-#include "vm/assert.h"
 #include "vm/class_finalizer.h"
+#include "vm/code_generator.h"
 #include "vm/compiler.h"
 #include "vm/dart_entry.h"
 #include "vm/native_entry.h"