3DS: Fix DISABLE_THREADING build

CHANGES

@@ -47,6 +47,7 @@ Misc:
  - Qt: Optimize log viewer
  - GBA RR: Starting from savestate now embeds the savegame
  - Libretro: Add install target for libretro core
+ - 3DS: Update to new ctrulib API
 
 0.3.2: (2015-12-16)
 Bugfixes:

src/util/threading.h

@@ -22,7 +22,12 @@
 #endif
 #endif
 #ifdef DISABLE_THREADING
+#ifdef _3DS
+// ctrulib already has a type called Thread
+#include <3ds/thread.h>
+#else
 typedef void* Thread;
+#endif
 typedef void* Mutex;
 typedef void* Condition;