travis: fix up go list error redirection
travis: fix up go list error redirection

Suggested by @akalin-keybase.

Issue: #529

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