Bump SDL to 2.28.5 and add FFmpeg for AV1 parsing

libs/SDL2/include/SDL_config_os2.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -43,6 +43,7 @@
 /*#undef SDL_JOYSTICK_HIDAPI */
 #else
 #define SDL_JOYSTICK_HIDAPI 1
+#define HAVE_LIBUSB 1
 /* dynamically loaded libusb-1.0 dll: */
 #define SDL_LIBUSB_DYNAMIC "usb100.dll"
 #endif
@@ -56,9 +57,6 @@
 #define SDL_TIMER_OS2 1
 #define SDL_FILESYSTEM_OS2 1
 
-/* Enable assembly routines */
-#define SDL_ASSEMBLY_ROUTINES 1
-
 /* use libsamplerate for audio rate conversion. */
 /*#define HAVE_LIBSAMPLERATE_H 1 */
 
@@ -105,7 +103,11 @@
 #define HAVE_GETENV 1
 #define HAVE_SETENV 1
 #define HAVE_PUTENV 1
+/* OpenWatcom requires specific calling conventions for qsort and bsearch */
+#ifndef __WATCOMC__
 #define HAVE_QSORT 1
+#define HAVE_BSEARCH 1
+#endif
 #define HAVE_ABS 1
 #define HAVE_BCOPY 1
 #define HAVE_MEMSET 1