.../drv_core/abb/abb.[ch]: sync with Tourmaline The changes being synced are: 1) ABB semaphore protection overhaul; 2) New ABB_SLEEP_RESTRICTION definition in fc-target.h

/* This file is needed just to make sure the archiver isn't called
 * with an empty list of object files. */

static void aci_dummy_dont_call_this(void)
{
}