Fix the shutdown sequence for maemo, SDL and simulator builds

Do proper shutdown in RaaA builds like writeout of
last.FM scrobbler file and other neat things.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29309 a1c6a512-1295-4272-9138-f99709370657

firmware/target/hosted/maemo/maemo-thread.c

@@ -23,6 +23,7 @@
 #include <libhal.h>
 #include <libosso.h>
 #include <SDL_thread.h>
+#include <SDL_events.h>
 
 #include "config.h"
 #include "system.h"
@@ -213,6 +214,11 @@ void reset_poweroff_timer(void)
 
 void shutdown_hw(void)
 {
+    /* Shut down SDL event loop */
+    SDL_Event event;
+    memset(&event, 0, sizeof(SDL_Event));
+    event.type = SDL_USEREVENT;
+    SDL_PushEvent(&event);
 }
 
 void cancel_shutdown(void)