Disable harmless warnings for 3rdparty code: ICU.

BUG=102390
Review URL: https://chromiumcodereview.appspot.com/9178024

git-svn-id: http://src.chromium.org/svn/trunk/deps/third_party/icu46@117933 4ff67af0-8c30-449e-8e8b-ad334ec8d88c
1 file changed