[PATCH] Vlv2TbltDevicePkg: Fix typo in script file

["Guo, Mang" <mang.guo@intel.com>]

To prevent output from being shown, output file should be 'nul', not 'null'

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Guo Mang <mang.guo@intel.com>
---
 Vlv2TbltDevicePkg/bld_vlv.bat | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/Vlv2TbltDevicePkg/bld_vlv.bat b/Vlv2TbltDevicePkg/bld_vlv.bat
index 547b2b1..0f797aa 100644
--- a/Vlv2TbltDevicePkg/bld_vlv.bat
+++ b/Vlv2TbltDevicePkg/bld_vlv.bat
@@ -1,7 +1,7 @@
 @REM @file
 @REM   Windows batch file to build BIOS ROM
 @REM
-@REM Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>
+@REM Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
 @REM This program and the accompanying materials
 @REM are licensed and made available under the terms and conditions of the BSD License
 @REM which accompanies this distribution.  The full text of the license may be found at
@@ -68,11 +68,11 @@ if /i "%~1"=="/l" (
 if /i "%~1" == "/c" (
     echo Removing previous build files ...
     if exist build (
-        del /f/s/q build > null
+        del /f/s/q build > nul
         rmdir /s/q build
     )
     if exist conf\.cache (
-        del /f/s/q conf\.cache > null
+        del /f/s/q conf\.cache > nul
         rmdir /s/q conf\.cache
     )
     echo.
-- 
2.10.1.windows.1