intl: add deprecation warning for v8BreakIterator
Checklist
-
make -j8 test
(UNIX), orvcbuild test nosign
(Windows) passes -
tests and/or benchmarks are included -
commit message follows commit guidelines
Affected core subsystem(s)
intl, V8
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data