sim: m32c: use UTF-8 encoding

We only support UTF-8 nowadays, so stop using ISO-8859-1.

Maybe we should delete this logic entirely, but for now,
do the bare min conversion to keep it compiling.

sim/m32c/mem.c

@@ -221,7 +221,7 @@ mem_put_byte (int address, unsigned char value)
 	static int old_led = -1;
 	static char *led_on[] =
 	  { "\033[31m O ", "\033[32m O ", "\033[34m O " };
-	static char *led_off[] = { "\033[0m · ", "\033[0m · ", "\033[0m · " };
+	static char *led_off[] = { "\033[0m · ", "\033[0m · ", "\033[0m · " };
 	int i;
 	if (old_led != value)
 	  {