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

runtime/lib/regexp_jsc.cc

Index: runtime/lib/regexp_jsc.cc
diff --git a/runtime/lib/regexp_jsc.cc b/runtime/lib/regexp_jsc.cc
index 2ae19a2186c6955cfb3bedfa00a37693b4c3cd98..0066aa7cc5457cac31d25ecc4846878c38d34400 100644
--- a/runtime/lib/regexp_jsc.cc
+++ b/runtime/lib/regexp_jsc.cc
@@ -1,4 +1,4 @@
-// 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.
 // This file encapsulates all the interaction with the
@@ -6,12 +6,11 @@
 
 #include "lib/regexp_jsc.h"
 
+#include "platform/assert.h"
 #include "vm/allocation.h"
-#include "vm/assert.h"
 #include "vm/exceptions.h"
 #include "vm/globals.h"
 #include "vm/isolate.h"
-
 #include "third_party/jscre/pcre.h"
 
 namespace dart {