Fix the windows auto update scripts.

gclient.bat

 @echo off
 :: Copyright (c) 2009 The Chromium Authors. 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 is a stub to sync .\bootstrap first and defer control to
 :: .\bootstrap\gclient.bat, which will sync back '.'. This is unless auto
 :: update is disabled, were gclient.py is directly called.
 
 :: Shall skip automatic update?
 IF "%DEPOT_TOOLS_UPDATE%" == "0" GOTO :SKIP_UPDATE
 :: We can't sync if .\.svn\. doesn't exist.
-IF NOT EXIST "%~dp0.svn" GOTO :SKIP_UPDATE
+IF NOT EXIST "%~dp0.svn\." GOTO :SKIP_UPDATE
 
 :: Will download svn and python if not already installed on the system.
 call "%~dp0bootstrap\win\win_tools.bat"
 if errorlevel 1 goto :EOF
 
 :: Sync the bootstrap directory *only after*.
 call svn up -q "%~dp0bootstrap"
 :: still continue even in case of error.
 goto :UPDATE
 
 
 :SKIP_UPDATE
 :: Don't bother to try to update any thing.
 python "%~dp0\gclient.py" %*
 goto :EOF
 
 
 :UPDATE
 :: Transfer control to ease the update process. The following lines won't be
 :: executed so don't add any! Specifically, don't use 'call' in the following
 :: line.
 "%~dp0bootstrap\gclient.bat" %*
 goto :EOF