ticket:10144: Updated ICU version nubmer to 51.2.

git-svn-id: http://source.icu-project.org/repos/icu/icu@33687 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10148: The C++ implementation of tzid-windows id converter API and the test cases.

git-svn-id: http://source.icu-project.org/repos/icu/icu@33689 251d0590-4201-4cf1-90de-194747b24ca1