Changes:
2019-03-07 dburger@chromium.org Add dummy BuilderConfig proto to lucicfg external protos.
2019-03-06 vadimsh@chromium.org [lucicfg] Forbid "luci.*" bucket names in luci.bucket(...).
2019-03-06 vadimsh@chromium.org [lucicfg] Use 'flatten_buildbucket_cfg' tool to normalize cr-buildbucket.cfg.
2019-03-06 vadimsh@chromium.org [lucicfg] Add 'triggered_by' support to CQ config generator.
2019-03-06 vadimsh@chromium.org [lucicfg] Add "lucicfg semantic-diff" subcommand to aid in the migration.
2019-03-05 vadimsh@chromium.org [lucicfg] Add luci.cq_tryjob_verifier(...).
2019-03-05 vadimsh@chromium.org [lucicfg] Add retry_config support.
2019-03-04 vadimsh@chromium.org [lucicfg] Initial implementation of luci.cq_group(...).
2019-03-02 vadimsh@chromium.org [lucicfg] Make '#!/usr/bin/env lucicfg' work.
2019-02-28 vadimsh@chromium.org [lucicfg] Add luci.cq(...) rule.
2019-02-27 vadimsh@chromium.org [lucicfg] Get rid of `refs_regexps`, always accept regexps via `refs`.
2019-02-27 seanabraham@chromium.org crostesting: Change "BuildCritera" to "TargetCriteria"

R=tandrii@chromium.org

Change-Id: I8477088c50764ba847424eb1e59be34d03d86eb1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/1509016
Commit-Queue: Vadim Shtayura <vadimsh@chromium.org>
Commit-Queue: Andrii Shyshkalov <tandrii@chromium.org>
Reviewed-by: Andrii Shyshkalov <tandrii@chromium.org>