libkbfs: fix go vet for the impatient debug dumper
libkbfs: fix go vet for the impatient debug dumper

Issue: KBFS-2746

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