Update pt-PT dictionary to version 14.7.8.2

Change-Id: Idebf65d3a44eb6a70df0a094f0038f3bb8ad54d6
(cherry picked from commit 54aa90ef47bd8e2d062aa455dcc5d6f1ae02887b)
Reviewed-on: https://gerrit.libreoffice.org/10497
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>