Update update_canary_angle script. Make it search in any output directory. Bug: None Change-Id: I4ea3ee70bbf051e534e97a972fcb6bbcb5ceeecc Reviewed-on: https://chromium-review.googlesource.com/1208512 Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>