Add platform specific expected files for select-event.html test

Bug: 1161590
Change-Id: I17f1fadfba815efa42bff7afe7abc3f27960e533
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2605394


Reviewed-by: Joey Arhar <jarhar@chromium.org>
Commit-Queue: Yu Han <yuzhehan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#839496}