$NetBSD$

Use fseeko and ftello on NetBSD as well,

--- GsKit/base/utils/property_tree/tinyxml2.cpp.orig	2022-06-25 15:01:13.000000000 +0000
+++ GsKit/base/utils/property_tree/tinyxml2.cpp
@@ -103,7 +103,7 @@ distribution.
 #if defined(_WIN64)
     #define TIXML_FSEEK _fseeki64
     #define TIXML_FTELL _ftelli64
-#elif defined(__APPLE__) || (__FreeBSD__)
+#elif defined(__APPLE__) || (__FreeBSD__) || defined(__NetBSD__)
     #define TIXML_FSEEK fseeko
     #define TIXML_FTELL ftello
 #elif defined(ANDROID)
