Using exclude-wildcard in reverse mode causes long filename to have wrong owner

[DCsunset]

Steps to reproduce:

1. Initialize a dir reverse in reverse mode
2. Create a dir called long inside it (for exclude-wildcard later)
3. Create a file with long name in long dir
4. Mount the directory in reverse mode with gocryptfs -reverse -ew '*' -ew '!long' reverse mnt" reverse mnt

After the above steps, the owner of file gocryptfs.longname.*.name in the mounted directory is root instead of the file's original user and is not readable by the other users.
If I remove the -ew flags, that file will have the correct user instead of root.

Might be related to #95.