Adding another test for exception_ptr.

[SVN r59259]

test/Jamfile.v2

@@ -36,6 +36,7 @@ run refcount_ptr_test.cpp ;
 run current_exception_cast_test.cpp ;
 run no_exceptions_test.cpp : : : <exception-handling>off ;
 run errinfos_test.cpp ;
+run exception_ptr_test.cpp /boost//thread : : : <threading>multi ;
 compile-fail exception_fail.cpp ;
 compile-fail throw_exception_fail.cpp ;
 compile-fail error_info_const_fail.cpp ;