updated Breton dictionary to version 0.12

Change-Id: Ie8a27027fdfa7cd2fe3dbcdd98d53551596a9da9
(cherry picked from commit 117686ef79d5a2a42e328dcef8af3969af933700)
Reviewed-on: https://gerrit.libreoffice.org/9355
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>