Replace MSVC __debugbreak with cross-compiler DEBUG_BREAK macro. (#1540)

Minecraft.World/Debug.h

@@ -0,0 +1,12 @@
+#pragma once
+#include <csignal>
+
+#if defined(_MSC_VER)
+    #define DEBUG_BREAK() __debugbreak()
+#elif defined(__GNUC__) || defined(__clang__)
+    #define DEBUG_BREAK() __builtin_trap()
+#elif defined(SIGTRAP)
+    #define DEBUG_BREAK() std::raise(SIGTRAP)
+#else
+    #define DEBUG_BREAK() ((void)0)
+#endif