Select has limitations on the fd values it could accept and silently
breaks when it is reached.
(cherry picked from commit a8475bbdb64e638bd8161df9647876fd23f8a29a)
This also lists the objects from those two libraries as internal (by adding
the ff_ prefix) so that they can then be hidden via linker scripts.
(cherry picked from commit c6610a216ed2948885772154a2eed696e0cb4aca)
