Automatic merge from submit-queue (batch tested with PRs 58561, 58749). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Create benchmark results file before writing to it

To see if it helps with https://github.com/kubernetes/test-infra/issues/6392#issuecomment-360127048

/cc @gmarek