ticket:10398: copy trunk to maint branch

git-svn-id: http://source.icu-project.org/repos/icu/icu@34465 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10398: copy maint to rc

git-svn-id: http://source.icu-project.org/repos/icu/icu@34466 251d0590-4201-4cf1-90de-194747b24ca1