qemuDomainCreateNamespace: s/unlink/rmdir/

If something goes wrong in this function we try a rollback. That
is unlink all the directories we created earlier. For some weird
reason unlink() was called instead of rmdir().
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

src/qemu/qemu_domain.c

@@ -7467,9 +7467,9 @@ qemuDomainCreateNamespace(virQEMUDriverPtr driver,
  cleanup:
     if (ret < 0) {
         if (devPath)
-            unlink(devPath);
+            rmdir(devPath);
         for (i = 0; i < ndevMountsSavePath; i++)
-            unlink(devMountsSavePath[i]);
+            rmdir(devMountsSavePath[i]);
     }
     virStringListFreeCount(devMountsSavePath, ndevMountsSavePath);
     VIR_FREE(devPath);