test: add TODO about calling SyncAll on a directory better
test: add TODO about calling SyncAll on a directory better

Suggested by akalin-keybase.

Issue: #936

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