ticket:9696: Updated the API doc for ICU4C SimpleDateFormat with the latest CLDR specification.

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk@33270 251d0590-4201-4cf1-90de-194747b24ca1
ticket:9925: Pick up the non-gregorian date format fixes from CLDR 8218 (C)

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk@33273 251d0590-4201-4cf1-90de-194747b24ca1
ticket:7103: remove obsolete/redundant collation locales

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk@33274 251d0590-4201-4cf1-90de-194747b24ca1