when at the end of a word (τελικό σίγμα), also add Autocorrect
exceptions to common Greek abbreviations.

Change-Id: Id6722594ab72a21aeec77daf7571d142eebf20e8
Reviewed-on: https://gerrit.libreoffice.org/53372Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: László Németh <nemeth@numbertext.org>