For Support Korean Calendar Dangi(단기/檀紀), add Dangi calendar locale
data
<Calendar unoid="dangi" default="false">

Change-Id: Ifd04be3dbbf3daa1d7f3b1e238e743b697701b6e
Reviewed-on: https://gerrit.libreoffice.org/72944
Tested-by: Jenkins
Reviewed-by: Eike Rathke <erack@redhat.com>