Update ICU to r213354

At this revision, all chromium targets work with the V8 internal i18n
support

BUG=v8:2745
R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/20090002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15863 ce2b1a6d-e550-0410-aec6-3dcde31c8c00