ticket:9955: ICU4C 51 API status promotion draft


git-svn-id: http://source.icu-project.org/repos/icu/icu/branches/michaelow@33276 251d0590-4201-4cf1-90de-194747b24ca1
ticket:9955: ICU4C 51 API status promotion draft


git-svn-id: http://source.icu-project.org/repos/icu/icu/branches/michaelow@33285 251d0590-4201-4cf1-90de-194747b24ca1