Merge pull request #20289 from MarkDaoust/r1.9
authorMichael Case <mikecase@google.com>
Mon, 25 Jun 2018 20:46:08 +0000 (13:46 -0700)
committerGitHub <noreply@github.com>
Mon, 25 Jun 2018 20:46:08 +0000 (13:46 -0700)
r1.9: release notes Update.


Trivial merge