ticket:9955: merge ICU4C API status promotion to trunk

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk/source@33306 251d0590-4201-4cf1-90de-194747b24ca1
ticket:9929: coll/zh.txt with new native-script-first reordering, works fine in ICU4C

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk/source@33307 251d0590-4201-4cf1-90de-194747b24ca1