lib/sql/migration: Fix column names for MySQL/MariaDB

lib/sql/migration: Fix column names for MySQL/MariaDB

The first issue is that patchwork was no longer accepting new patches via
the apps/patchwork/bin/parsemail.sh script.  When I was trying to invoke
it manually, it only printed "no project found".  I was able to figure
out that this was caused by changes to the database scheme which are taken
care of by the two SQL scripts:

  lib/sql/migration/012-project-add-columns.sql
  lib/sql/migration/013-bundle-names.sql

The catch - these first script don't run with MySQL - or rather MariaDB that
Fedora has switched to.  MariaDB doesn't like the quotes around the table
and column names.  Patch below.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>