ICU now supports uppercasing in Greek via its regular uppercasing API.
So, there's no need to use a slow transliteration API for uppercasing
in Greek.

This CL includes rolling ICU to ICU 58.1.

Besides, drop intl402/Intl/getCanonicalLocales/weird-cases from
test262.status because it passes now with ICU 58.1.

BUG=chromium:637001,v8:5012

Review-Url: https://codereview.chromium.org/2491333003
Cr-Commit-Position: refs/heads/master@{#41009}