Fixed option name, ForceRebuild

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@4748 6f19259b-4bc3-4df7-8a09-765794883524
diff --git a/BaseTools/toolsetup.bat b/BaseTools/toolsetup.bat
index 2f657ba..54def14 100755
--- a/BaseTools/toolsetup.bat
+++ b/BaseTools/toolsetup.bat
@@ -226,7 +226,7 @@
     echo tested versions of the tools have been tested and included in the

     echo EDK II repository.

     echo.

-    echo If you really want to build the tools, use the FORCE_REBUILD option.

+    echo If you really want to build the tools, use the ForceRebuild option.

     echo.

     goto end

   )