Introduce runtime/platform directory for code shared between vm

runtime/bin/process_win.cc

 // Copyright (c) 2011, 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 <process.h>
 
 #include "bin/builtin.h"
-#include "bin/globals.h"
 #include "bin/process.h"
 #include "bin/eventhandler.h"
 
+#include "platform/globals.h"
+
 static const int kReadHandle = 0;
 static const int kWriteHandle = 1;
 
 class ProcessInfo {
  public:
   ProcessInfo(DWORD process_id, HANDLE process_handle, HANDLE exit_pipe)
       : process_id_(process_id),
         process_handle_(process_handle),
         exit_pipe_(exit_pipe) { }
 
@@ skipping 383 matching lines @@
       return false;
     }
   }
   return true;
 }
 
 
 void Process::Exit(intptr_t id) {
   RemoveProcess(id);
 }