Add a scheduler for the Trusty bots.
Add a scheduler for the Trusty bots.

BUG=349238, 349236

Review URL: https://codereview.chromium.org/250733006

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@266198 0039d316-1c4b-4281-b951-d872f2087c98

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