Add Cornish (kw-UK) and Pite Sami (sje-SE) to the list of
available spell checking languages to support spell checkers
that are being currently developed:

  https://victorio.uit.no/langtech/trunk/langs/cor
  https://victorio.uit.no/langtech/trunk/langs/sje

Change-Id: I2f95fe5339e7cc31d64fa13cf2f74268b159215e
Reviewed-on: https://gerrit.libreoffice.org/4609Reviewed-by: Eike Rathke <erack@redhat.com>
Tested-by: Eike Rathke <erack@redhat.com>