resource-manager: Add epoll type listener support

resource-manager: Add epoll type listener support

To support ease of use for epoll type listener, this introduces
following APIs:
 - syscommon_resman_register_epoll_listener: register fd to epoll
   listener worker thread and returns listener handle id.
 - syscommon_resman_unregister_epoll_listener: unregister fd from
   worker for the correspongding handle id. (fd is not closed by this
   function, so caller resource driver should be close fd by its own
   responsibility.

Change-Id: Ifc42b30903cd222a35b93f9895ae0cd183a3a504
Signed-off-by: Dongwoo Lee <dwoo08.lee@samsung.com>