bisect-kit: detect incorrect board name when diagnoser init

BUG=b:128943419
TEST=./diagnose_cros_autotest.py init --board foo

Change-Id: Iced109b347c4efd6f083e83cc39daa60969e888d
Reviewed-on: https://chromium-review.googlesource.com/1626915
Commit-Ready: Kuang-che Wu <kcwu@chromium.org>
Tested-by: Kuang-che Wu <kcwu@chromium.org>
Legacy-Commit-Queue: Commit Bot <commit-bot@chromium.org>
Reviewed-by: Chi-Ngai Wan <cnwan@google.com>
2 files changed