sysutils: compile on FreeBSD/amd64
sysutils: compile on FreeBSD/amd64

Reported by cobaugh.

Issue: #1000

keybase/client,keybase/kbfs,keybase/client,keybase/kbfs,keybase/client,keybase/client,keybase/client,keybase/kbfs,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/kbfs