fdo#73149 add Excel 2010 functions ERF.PRECISE and ERFC.PRECISE

Change-Id: I3199470ec92923e8cc12156f21dd397d870cc1e0
Reviewed-on: https://gerrit.libreoffice.org/8930
Reviewed-by: Eike Rathke <erack@redhat.com>
Tested-by: Eike Rathke <erack@redhat.com>