Add mp_eval_or

test/Jamfile

@@ -125,6 +125,7 @@ run mp_cond.cpp ;
 run mp_cond_sf.cpp ;
 run mp_not_fn.cpp ;
 run mp_eval_if_not.cpp ;
+run mp_eval_or.cpp ;
 
 # integer_sequence
 run integer_sequence.cpp ;