tlf_journal: fix data race when flushing block entries (#324)
tlf_journal: fix data race when flushing block entries (#324)

Issue: KBFS-1493
keybase/client,keybase/client,keybase/client,keybase/client,keybase/kbfs,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/kbfs,keybase/kbfs,keybase/kbfs,keybase/client