Add a link to the Chromium Endure overview in buildbot announcement.
Add a link to the Chromium Endure overview in buildbot announcement.


BUG=chromium-os:32302
NOTRY=true


Review URL: https://chromiumcodereview.appspot.com/12212126

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@182047 0039d316-1c4b-4281-b951-d872f2087c98

eunchong/build,eunchong/build,eunchong/build,eunchong/build