fixes

Author: yaananth

tests/runtime/out_azure_kusto.c

@@ -1,5 +1,9 @@
 /* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
 
+#ifndef _XOPEN_SOURCE
+#define _XOPEN_SOURCE 700
+#endif
+
 /*  Fluent Bit
  *  ==========
  *  Copyright (C) 2019-2022 The Fluent Bit Authors