Disable -Wambiguous-reversed-operator in ICU.

ICU TLs have decided to intentionally avoid fixing this warning in order
to avoid breaking the stable API.

Bug: 1284275
Change-Id: Icbe597aa87429bd13fc1e659100dac5a4b32c6e5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/deps/icu/+/3647189
Reviewed-by: Frank Tang <ftang@chromium.org>
1 file changed