freebsd-ports: fix bug that remove most files
freebsd-ports: fix bug that remove most files

deskutils/taskd distinfo has an unexpected space after SHA256 of taskd-1.1.0.tar.gz, which makes $meta generation command produce incorrect result:

```
 taskd-1.1.0.tar.gz
c5a0507f0406c88119f0064671b4d27fb45e8191e608d2e6ceeba83fbb110b92         qtile-0.18.1.tar.gz
c267442c506e674b8cba800c0a3425904d91b69f25c0cf5bcb8f31445361c0a0 0001-Remove-pure-attribute-from-functions-with-side-effec.patch
```

Thus `comm` cannot get a correct old file list, leading to most files deleted.

ustclug/ustcmirror-images,ustclug/ustcmirror-images,ustclug/ustcmirror-images,ustclug/ustcmirror-images,ustclug/ustcmirror-images