Add Welsh to CrOS ICU

Binary size impact: 84KB on CrOS only

Bug: b/192306364
Change-Id: I0e5b86e2572dfcbd6f51ee3e984c5525ab15b9b2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/deps/icu/+/3577500
Reviewed-by: Frank Tang <ftang@chromium.org>
3 files changed