cmake: enable unit testing with check_check
cmake: enable unit testing with check_check

To invoke the tests, type:
$ make test

git-svn-id: ae38cf1093b87151f738d2b2220cac7742ad2e55@944 64e312b2-a51f-0410-8e61-82d0ca0eb02a

lubosz/check,lubosz/check,lubosz/check,lubosz/check