Part II of adding callback argument to sim_open(). Update all the

other simulators; remove SIM_DESC from depreciated function
sim_set_callbacks().

sim/tic80/sim-main.h

@@ -27,6 +27,9 @@
 
 #include <signal.h>
 #include <errno.h>
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
 
 /* These are generated files.  */
 #include "itable.h"