ticket:8464: Initial commit of unit test for ICU4C relative dates. Two main english tests done. Still have to add the more specialized tests though.

git-svn-id: http://source.icu-project.org/repos/icu/icu/branches/tkeep@34665 251d0590-4201-4cf1-90de-194747b24ca1
ticket:8464: Completed C++ test for relative dates.

git-svn-id: http://source.icu-project.org/repos/icu/icu/branches/tkeep@34666 251d0590-4201-4cf1-90de-194747b24ca1