testnative: include SDL_build_config.h instead of SDL_internal.h

test/testnative.c

@@ -11,15 +11,16 @@
 */
 /* Simple program:  Create a native window and attach an SDL renderer */
 
-#include <stdlib.h>
+#include "testnative.h"
 
 #include <SDL3/SDL.h>
 #include <SDL3/SDL_main.h>
 #include <SDL3/SDL_test.h>
 
-#include "testnative.h"
 #include "testutils.h"
 
+#include <stdlib.h>
+
 #define WINDOW_W    640
 #define WINDOW_H    480
 #define NUM_SPRITES 100