sign language pack on Mac, and add the locale name to the App name

Change-Id: Ie05a03e1edc02527b6895da07cfede69df7ec157
Reviewed-on: https://gerrit.libreoffice.org/7386
Reviewed-by: Christian Lohmaier <lohmaier+LibreOffice@googlemail.com>
Tested-by: Christian Lohmaier <lohmaier+LibreOffice@googlemail.com>