gitlab-backup/restore: Gitlab >= 8.5 now wants uploads to be 0700

Following up on 48062989 (gitlab-backup/restore: Gitlab wants uploads/
to be 0750 and dirs inside uploads/ to be 0755):

Starting from 8.5:

    https://gitlab.com/gitlab-org/gitlab-ce/commit/4f946f03

GitLab wants uploads/ to be 0700 and dirs inside uploads/ to be 0700
too.

contrib/gitlab-backup

@@ -202,10 +202,10 @@ backup_restore() {
     $GIT_BACKUP restore $HEAD gitlab/misc:"$tmpd/gitlab_backup"
     backup_info="$tmpd/gitlab_backup/backup_information.yml"
 
-    # gitlab wants uploads/ to be 0750 and dirs inside uploads/ to be 0755
-    chmod 0750 "$tmpd/gitlab_backup"/uploads*
+    # gitlab >= 8.5 wants uploads/ to be 0700 and dirs inside uploads/ to be 0700
+    chmod 0700 "$tmpd/gitlab_backup"/uploads*
     find "$tmpd/gitlab_backup"/uploads* -mindepth 1 -type d \
-        -exec chmod 0755 {} ';'
+        -exec chmod 0700 {} ';'
 
     # recreate tarballs from *.tar.gz directories
     find "$tmpd/gitlab_backup" -maxdepth 1 -type d -name "*.tar.gz" | \