added Lithuanian "LTL" to EUROCONVERT(), CONVERT()

Change-Id: Iefde129177df827c4b6508ff190f20e1e1973221
Reviewed-on: https://gerrit.libreoffice.org/11088
Reviewed-by: Thomas Arnhold <thomas@arnhold.org>
Tested-by: Thomas Arnhold <thomas@arnhold.org>
(cherry picked from commit 21c8b5815a21b6586fe13b12d00a9fb432c2aef4)
Reviewed-on: https://gerrit.libreoffice.org/12463
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>