Move src/main/haiku/ to src/core/

turns out that this wasn't even built as a static libSDLmain,
but as part of the (possibly dynamic) libSDL3

src/audio/haiku/SDL_haikuaudio.cc

@@ -27,7 +27,7 @@
 #include <SoundPlayer.h>
 #include <signal.h>
 
-#include "../../main/haiku/SDL_BeApp.h"
+#include "../../core/haiku/SDL_BeApp.h"
 
 extern "C"
 {

src/video/haiku/SDL_BWin.h

@@ -42,7 +42,7 @@ extern "C" {
 #if SDL_VIDEO_OPENGL
 #include <opengl/GLView.h>
 #endif
-#include "../../main/haiku/SDL_BApp.h"
+#include "../../core/haiku/SDL_BApp.h"
 
 enum WinCommands
 {

src/video/haiku/SDL_bframebuffer.cc

@@ -29,7 +29,7 @@
 #include "SDL_bmodes.h"
 #include "SDL_BWin.h"
 
-#include "../../main/haiku/SDL_BApp.h"
+#include "../../core/haiku/SDL_BApp.h"
 
 #ifdef __cplusplus
 extern "C" {

src/video/haiku/SDL_bmessagebox.cc

@@ -26,7 +26,7 @@
 
 
 /* For application signature. */
-#include "../../main/haiku/SDL_BeApp.h"
+#include "../../core/haiku/SDL_BeApp.h"
 
 #include <Alert.h>
 #include <Application.h>

src/video/haiku/SDL_bmodes.cc

@@ -31,7 +31,7 @@
 #include "SDL_bopengl.h"
 #endif
 
-#include "../../main/haiku/SDL_BApp.h"
+#include "../../core/haiku/SDL_BApp.h"
 
 #ifdef __cplusplus
 extern "C" {

src/video/haiku/SDL_bopengl.cc

@@ -28,7 +28,7 @@
 #include <KernelKit.h>
 #include <OpenGLKit.h>
 #include "SDL_BWin.h"
-#include "../../main/haiku/SDL_BApp.h"
+#include "../../core/haiku/SDL_BApp.h"
 
 #ifdef __cplusplus
 extern "C" {

src/video/haiku/SDL_bvideo.cc

@@ -20,7 +20,7 @@
 */
 
 #include "SDL_internal.h"
-#include "../../main/haiku/SDL_BApp.h"
+#include "../../core/haiku/SDL_BApp.h"
 
 #if SDL_VIDEO_DRIVER_HAIKU
 

src/video/haiku/SDL_bvideo.h

@@ -26,7 +26,7 @@
 extern "C" {
 #endif
 
-#include "../../main/haiku/SDL_BeApp.h"
+#include "../../core/haiku/SDL_BeApp.h"
 #include "../SDL_sysvideo.h"
 
 extern void HAIKU_VideoQuit(_THIS);