added ref_test

[SVN r12482]

status/regression.cfg

@@ -48,6 +48,7 @@ run libs/rational/rational_example.cpp
 run libs/rational/rational_test.cpp
 run libs/random/random_test.cpp
 run libs/random/random_demo.cpp
+run libs/utility/ref_test.cpp
 run libs/regex/test/regress/regex_test.cpp %boost/libs/regex/test/regress/tests.txt
 run libs/regex/test/regress/wregex_test.cpp %boost/libs/regex/test/regress/tests.txt
 run libs/smart_ptr/smart_ptr_test.cpp