Related: fdo#82259 list Apple Color Emoji as a symbol font.

Note that this is a blind fix, as I don’t have an OS X machine.

Change-Id: I43a98fbbee06117b914eae332d48b2793a266bce
Reviewed-on: https://gerrit.libreoffice.org/10812
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>