ticket:10821: change log update

git-svn-id: http://source.icu-project.org/repos/icu/icu@35851 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10934: A development branch for tz database abbreviation support.

git-svn-id: http://source.icu-project.org/repos/icu/icu@35855 251d0590-4201-4cf1-90de-194747b24ca1