Fix intl402/Locale/likely-subtags

Bug: v8:8236
Change-Id: I0f109d0bedb1fda3f5eaac9cfce935788f54b595
Reviewed-on: https://chromium-review.googlesource.com/c/1459745Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Frank Tang <ftang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59476}