Add mp_filter

test/Jamfile

@@ -48,6 +48,7 @@ run mp_transform_q.cpp ;
 run mp_transform_sf.cpp ;
 run mp_transform_if.cpp ;
 run mp_transform_if_q.cpp ;
+run mp_filter.cpp ;
 run mp_fill.cpp ;
 run mp_count.cpp ;
 run mp_count_if.cpp ;