vbootstrap.sh: add mknod /dev/urandom (Thanks to tomop-san)

git-svn-id: http://trac.vinelinux.org/repos/projects/vbootstrap/trunk@11232 ec354946-7b23-47d6-9f5a-488ba84defc7

vbootstrap.sh.in

@@ -102,6 +102,7 @@ touch $INSTDIR/etc/mtab
 mkdir $INSTDIR/dev
 mknod $INSTDIR/dev/null c 1 3
 mknod $INSTDIR/dev/console c 5 1
+mknod $INSTDIR/dev/urandom c 1 9
 
 # install base vine linux system.
 echo $"Installing basesystem."