Content of deleted directory still visible

ArchLinux, x86_64, kernel 5.14.7, latest git version of fuse-overlayfs

```sh
mkdir -p {overlay,mount,upper,lower/v/A}
fuse-overlayfs -o "lowerdir=lower,upperdir=upper,workdir=overlay" "mount"

rm -rf "mount/v/"
mkdir -p "mount/v/"
ls -alF "mount/v/"
stat mount/v/A
```

The last `stat` is supposed to error since `mount/v` should be empty, as verified by the `ls` yet running the script above prints something like,

```
total 0
drwxr-xr-x 2 yuyichao yuyichao 40 Sep 28 07:24 ./
drwxr-xr-x 3 yuyichao yuyichao 2 Sep 28 07:24 ../
File: mount/v/A
Size: 0 Blocks: 0 IO Block: 4096 directory
Device: 0,73 Inode: 46969979 Links: 2
Access: (0755/drwxr-xr-x) Uid: ( 1000/yuyichao) Gid: ( 1000/yuyichao)
Access: 2021-09-28 07:24:46.247284663 -0400
Modify: 2021-09-28 07:24:46.243951278 -0400
Change: 2021-09-28 07:24:46.243951278 -0400
Birth: -
```

which shows that the `ls` indeed see an empty directory but `stat` can still see something in it.

Start by running the shell reproduction on ArchLinux with the reported kernel and latest fuse-overlayfs, then compare the empty `ls -alF mount/v/` result with `stat mount/v/A`. The fix is complete when the recreated directory no longer exposes `lower/v/A` and the final `stat` errors as expected.

Written by the indexing model from the issue text.