Needed for crrev/c/1818876.

Bug: 1006794
Change-Id: I3a15701ed1fbf85cfeba27d127bbb37707e9aca1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/deps/icu/+/1834464


Reviewed-by: Jungshik Shin <jshin@chromium.org>