SDL_assert: add support for aarch64-w64-mingw32

GCC 15 development branch provides an experimental support for Windows on ARM64, which will be officially released next year, according to latest news.
I tried to compile SDL2 with this new compiler but I got a tiny problem into SDL_assert.h because it couldn't find the right platform.
However, it has been easy to fix and I included it into this PR.
More details can be also found here:
https://learn.microsoft.com/en-us/cpp/intrinsics/debugbreak?view=msvc-170

(cherry picked from commit 2cb1a2d0a7f1c9cb3177c907758322899c3041d5)

include/SDL3/SDL_assert.h

@@ -139,6 +139,8 @@ extern "C" {
     #define SDL_TriggerBreakpoint() __asm__ __volatile__ ( "brk #22\n\t" )
 #elif defined(SDL_PLATFORM_APPLE) && defined(__arm__)
     #define SDL_TriggerBreakpoint() __asm__ __volatile__ ( "bkpt #22\n\t" )
+#elif defined(_WIN32) && ((defined(__GNUC__) || defined(__clang__)) && (defined(__arm64__) || defined(__aarch64__)) )
+    #define SDL_TriggerBreakpoint() __asm__ __volatile__ ( "brk #0xF000\n\t" )
 #elif defined(__386__) && defined(__WATCOMC__)
     #define SDL_TriggerBreakpoint() { _asm { int 0x03 } }
 #elif defined(HAVE_SIGNAL_H) && !defined(__WATCOMC__)