[ion] Fix build of blackbox and simulator in DEBUG=1

ion/src/blackbox/events.cpp

@@ -1,6 +1,7 @@
 #include <ion/events.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <layout_events.h>
 #include "display.h"
 
 namespace Ion {

ion/src/simulator/init.cpp

@@ -10,6 +10,7 @@ extern "C" {
 #include <FL/Fl.H>
 #include <FL/Fl_Window.H>
 #include <FL/Fl_Box.H>
+#include <layout_events.h>
 
 #include "display/fltklcd.h"
 #include "keyboard/fltkkbd.h"