Usage() を修正

git-svn-id: http://trac.vinelinux.org/repos/projects/vbootstrap/trunk@5450 ec354946-7b23-47d6-9f5a-488ba84defc7

vbuilder.sh.in

@@ -13,7 +13,7 @@ EOF
     echo $"
 Options:
 	--profile:		set a profile
-	--version:		set [version] (default: ${DEFAULT_VERSION})
+	--version:		set [version] (default: ${VERSION})
 	--arch:			set [arch] (default: ${UARCH})
 	--category:		set [categories] (default: ${CATEGORIES})
 	--fetch-url:		set [fetch_url] to fetch packages (default: ${VBOOTSTRAP_FETCH_URL})