Update tryserver configuration with new linux and arm bots.

BUG=353487
TBR=jarin@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/220453007

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@20406 ce2b1a6d-e550-0410-aec6-3dcde31c8c00