Renames the script that deletes old email tables.

Signed-off-by: Stéphane Jacob <sj@m4x.org>

diff --git a/upgrade/1.1.0/new_mail_delete_old.sql.noauto b/upgrade/1.1.0/03_new_mail_delete_old.sql
similarity index 100%
rename from upgrade/1.1.0/new_mail_delete_old.sql.noauto
rename to upgrade/1.1.0/03_new_mail_delete_old.sql