exp/upbox: suppress keygen output unless an error occurs

This noise clutters up every upbox run.

Change-Id: Ibbc368b690bcb91a11fe73d7591c7ea6781561ed
Reviewed-on: https://upspin-review.googlesource.com/10068
Reviewed-by: Rob Pike <r@golang.org>
1 file changed
tree: 7c6f943a5838254d21d1179b9adec877b643f30b
  1. README.md
  2. client/
  3. cmd/
  4. filesystem/
  5. upbox/
README.md

Experimental components

This directory contains components that are experimental or under development.