TBR: Don't print an error when the jiri command fails, since it will have printed its own error.
TBR: Don't print an error when the jiri command fails, since it will
have printed its own error.

Change-Id: I7957225f2e13de711fd2bb11e3f9a3ab83172459

vanadium/go.devtools,vanadium/go.devtools,vanadium/go.devtools