ecore: Fix clean shutdown

ecore: Fix clean shutdown

There is no good reason to not shutdown a library properly. The loop
object can easily be deleted safely, if it is properly initialized. The
del event happens before destruction so it is too early to set the
singleton variable to NULL. Do that as late as possible and all calls to
efl_loop_main_get() will work as expected.

The issue with fd's was simply that they were not initialized to -1
(timer_fd), as some #ifdef statements have disappeared.