861fa09131
Truncated dir name can't give any useful information, print whole dir
name will.
Bad debug log is like this:
```
DEBU[2449] aufs error unmounting /var/lib/doc: no such file or directory
```
Signed-off-by: Zhang Wei <zhangwei555@huawei.com>
(cherry picked from commit
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||
|---|---|---|
| .. | ||
| aufs.go | ||
| aufs_test.go | ||
| dirs.go | ||
| mount.go | ||
| mount_linux.go | ||
| mount_unsupported.go | ||