MDEV-32361 mariadb-backup --move-back leaves out ib_logfile0

copy_back(): Also copy the dummy empty ib_logfile0 so that
MariaDB Server 10.8 or later can be started after
--copy-back or --move-back.

Thanks to Daniel Black for reporting this.

extra/mariabackup/backup_copy.cc

@@ -1984,8 +1984,10 @@ copy_back()
 				 dst_dir, i);
 			unlink(filename);
 		}
-	} else if (!(ret = copy_or_move_file(ds_tmp, "ib_logfile0", "ib_logfile0",
-					     dst_dir, 1))) {
+	}
+
+	if (!(ret = copy_or_move_file(ds_tmp, "ib_logfile0", "ib_logfile0",
+				      dst_dir, 1))) {
 		goto cleanup;
 	}
 	ds_destroy(ds_tmp);