DEBUG: resolvers: unstatify process_resolvers() to make it appear in profiling

The function appears like this in "show profiling tasks", so let's export
it:

  function       calls  cpu_tot  cpu_avg  lat_tot  lat_avg
  main+0x1463f0     92  77.28us  839.0ns  2.018ms  21.93us <- wake_expired_tasks@src/task.c:429 task_drop_running
1 file changed