Use xcopy, mot mklink in link.bat; No an error if directory does not exist in unlink.bat

tools/link.bat

@@ -2,7 +2,7 @@
 
 rem tools/link.bat
 rem
-rem   Copyright (C) 2012 Gregory Nutt. All rights reserved.
+rem   Copyright (C) 2012, 2014 Gregory Nutt. All rights reserved.
 rem   Author: Gregory Nutt <gnutt@nuttx.org>
 rem
 rem Redistribution and use in source and binary forms, with or without
@@ -33,6 +33,12 @@ rem ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 rem POSSIBILITY OF SUCH DAMAGE.
 rem
 
+set usemklink=
+if "%1"=="-m" (
+set usemklink="y"
+shift
+)
+
 set src=%1
 set link=%2
 
@@ -77,8 +83,14 @@ rem Copy the directory
 
 :MkLink
 
+if "%usemklink%"=="y" (
 /user:administrator mklink /d %src% %link%
 goto :End
+)
+
+xcopy %src% %link% /c /q /s /e /y /i
+echo FAKELNK > include\apps\.fakelnk
+goto :End
 
 :ShowUsage
 echo USAGE: %0 ^<src^> ^<link^>