Update generated Go sources in kythe/proto
Update generated Go sources in kythe/proto

Reviewers: shahms, fromberger, zarko

Reviewed By: zarko

Differential Revision: https://phabricator-dot-kythe-repo.appspot.com/D654

kythe/kythe,benjyw/kythe,legrosbuffle/kythe,bzz/kythe,benjyw/kythe,benjyw/kythe,benjyw/kythe,bowlofstew/kythe,kythe/kythe,benjyw/kythe,bowlofstew/kythe,bzz/kythe,kythe/kythe,legrosbuffle/kythe,kythe/kythe,bzz/kythe,bowlofstew/kythe,legrosbuffle/kythe,bzz/kythe,kythe/kythe,bowlofstew/kythe,kythe/kythe,bowlofstew/kythe,legrosbuffle/kythe,kythe/kythe,kythe/kythe,bzz/kythe,benjyw/kythe,bzz/kythe,legrosbuffle/kythe,bowlofstew/kythe,bowlofstew/kythe,legrosbuffle/kythe,bzz/kythe,legrosbuffle/kythe,bzz/kythe,kythe/kythe,legrosbuffle/kythe,bzz/kythe,bowlofstew/kythe,legrosbuffle/kythe,benjyw/kythe,bzz/kythe,legrosbuffle/kythe,bowlofstew/kythe,benjyw/kythe,benjyw/kythe,bzz/kythe,kythe/kythe,legrosbuffle/kythe,bzz/kythe,bowlofstew/kythe,benjyw/kythe,benjyw/kythe,kythe/kythe,bowlofstew/kythe,benjyw/kythe