adds GDK suspend/resume basic handling (#6596)

src/dynapi/SDL2.exports

@@ -851,6 +851,7 @@
 ++'_SDL_utf8strnlen'.'SDL2.dll'.'SDL_utf8strnlen'
 # ++'_SDL_GDKGetTaskQueue'.'SDL2.dll'.'SDL_GDKGetTaskQueue'
 # ++'_SDL_GDKRunApp'.'SDL2.dll'.'SDL_GDKRunApp'
+# ++'_SDL_GDKSuspendComplete'.'SDL2.dll'.'SDL_GDKSuspendComplete'
 ++'_SDL_GetOriginalMemoryFunctions'.'SDL2.dll'.'SDL_GetOriginalMemoryFunctions'
 ++'_SDL_ResetKeyboard'.'SDL2.dll'.'SDL_ResetKeyboard'
 ++'_SDL_GetDefaultAudioInfo'.'SDL2.dll'.'SDL_GetDefaultAudioInfo'

src/dynapi/SDL_dynapi_overrides.h

@@ -877,6 +877,7 @@
 #define SDL_utf8strnlen SDL_utf8strnlen_REAL
 #define SDL_GDKGetTaskQueue SDL_GDKGetTaskQueue_REAL
 #define SDL_GDKRunApp SDL_GDKRunApp_REAL
+#define SDL_GDKSuspendComplete SDL_GDKSuspendComplete_REAL
 #define SDL_GetOriginalMemoryFunctions SDL_GetOriginalMemoryFunctions_REAL
 #define SDL_ResetKeyboard SDL_ResetKeyboard_REAL
 #define SDL_GetDefaultAudioInfo SDL_GetDefaultAudioInfo_REAL

src/dynapi/SDL_dynapi_procs.h

@@ -959,6 +959,7 @@ SDL_DYNAPI_PROC(size_t,SDL_utf8strnlen,(const char *a, size_t b),(a,b),return)
 #if defined(__GDK__)
 SDL_DYNAPI_PROC(int,SDL_GDKGetTaskQueue,(XTaskQueueHandle *a),(a),return)
 SDL_DYNAPI_PROC(int,SDL_GDKRunApp,(SDL_main_func a, void *b),(a,b),return)
+SDL_DYNAPI_PROC(void,SDL_GDKSuspendComplete,(void),(),return)
 #endif
 SDL_DYNAPI_PROC(void,SDL_GetOriginalMemoryFunctions,(SDL_malloc_func *a, SDL_calloc_func *b, SDL_realloc_func *c, SDL_free_func *d),(a,b,c,d),)
 SDL_DYNAPI_PROC(void,SDL_ResetKeyboard,(void),(),)