ticket:8451: Cleanup use of U_EXPORT2 in Region class for windows build


git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk/source@33051 251d0590-4201-4cf1-90de-194747b24ca1
ticket:9497: Add tests for C date symbol functions

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk/source@33052 251d0590-4201-4cf1-90de-194747b24ca1