sched: Write out a message on startup

Send a "startup" message after completing the mcu init functions.
This may help detect mcu reboots during debugging.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

src/sched.c

@@ -329,6 +329,8 @@ sched_main(void)
     extern void ctr_run_initfuncs(void);
     ctr_run_initfuncs();
 
+    sendf("starting");
+
     int ret = setjmp(shutdown_jmp);
     if (ret)
         run_shutdown(ret);