fix submit strategy

"submit-in-pre-cq" treats anything other than "yes" as false

BUG=None
TEST=None

Change-Id: I1c960bf2bffbf4a8552a09b8f0c5e62249874665
Reviewed-on: https://chromium-review.googlesource.com/989512
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Kuang-che Wu <kcwu@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
1 file changed