add -Tidy bot to CQ

This catches things like use-after-move,
and would have saved us a day of debugging today.

Change-Id: Icc817a27838bf2e0bea557d2cb165b91d1fa2fbe
Reviewed-on: https://skia-review.googlesource.com/c/178986
Reviewed-by: Ravi Mistry <rmistry@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
1 file changed