HPCC-17160 do not define micro _LARGEFILE64_SOURCE on Windows

system/include/platform.h

@@ -67,9 +67,11 @@
 #endif
 
 #define _FILE_OFFSET_BITS 64
+#ifndef _WIN32
 #ifndef _LARGEFILE64_SOURCE
 #define _LARGEFILE64_SOURCE 1
 #endif
+#endif
 #if defined(__linux__)
 #ifndef _GNU_SOURCE
 #define _GNU_SOURCE