added ref_ct_test.cpp and ref_test.cpp test entries

[SVN r12523]

status/regression.cfg

@@ -90,5 +90,7 @@ run libs/utility/iterators_test.cpp
 compile-fail libs/utility/noncopyable_test.cpp
 run libs/utility/numeric_traits_test.cpp
 run libs/utility/operators_test.cpp
+compile libs/utility/ref_ct_test.cpp
+run libs/utility/ref_test.cpp
 run libs/utility/tie_example.cpp