V8 Buildbot: Add temporary tester recipe to release triggers.
V8 Buildbot: Add temporary tester recipe to release triggers.

BUG=315202
TBR=jarin@chromium.org

Review URL: https://codereview.chromium.org/195893029

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@257394 0039d316-1c4b-4281-b951-d872f2087c98

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