Replace define private with __friends

include/PSX/jabyengine_defines.h

@@ -10,6 +10,10 @@
 #define __section(name) __attribute__((section(name)))
 #define __collect(...) __VA_ARGS__
 
+#ifndef __friends
+    #define __friends private
+#endif //!__friends
+
 #ifdef __cplusplus
     #define __constexpr constexpr
     #define START_C_FUNCTIONS extern "C" {