Move Mutex and Monitor from vm/ to platform/

runtime/platform/assert.cc

Index: runtime/platform/assert.cc
diff --git a/runtime/platform/assert.cc b/runtime/platform/assert.cc
index 39ec602f18d0acb8da2d3a53d198aca9cb5794b5..ce4afb4f2689959e9e15588689242f927dcbead7 100644
--- a/runtime/platform/assert.cc
+++ b/runtime/platform/assert.cc
@@ -2,11 +2,12 @@
 // 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 <cstdlib>
 #include <sstream>
 #include <string>
 
-#include "platform/assert.h"
 #include "platform/globals.h"
 
 namespace dart {