See https://github.com/tc39/proposal-intl-list-format/pull/36

Bug: v8:8614
Change-Id: Ifa9bebf27163420562c0d62867b9a240b5c4c502
Reviewed-on: https://chromium-review.googlesource.com/c/1386324
Commit-Queue: Frank Tang <ftang@chromium.org>
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#58938}