Add try server configuration for 'git cl try'.
Add try server configuration for 'git cl try'.

BUG=
R=phajdan.jr@chromium.org

Review URL: https://codereview.chromium.org/177533029

git-svn-id: b158db1e4b4ab85d4c9e510fdef4b1e8c614b15b@19641 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh