tools: do not disable ICU's transliteration

V8 needs it for case conversion.
Ref: https://codereview.chromium.org/1812673005

PR-URL: https://github.com/nodejs/node/pull/8317


Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Ali Ijaz Sheikh <ofrobots@google.com>