fix for readline to handle setlocale() returning NULL

examples/loadables/getconf.c

@@ -1,4 +1,4 @@
-/* Copyright (C) 1991-2021 Free Software Foundation, Inc.
+/* Copyright (C) 1991-2021,2022 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    This program is free software; you can redistribute it and/or modify
@@ -21,7 +21,7 @@
 #include <unistd.h>
 #include <errno.h>
 #include <error.h>
-#include <libintl.h>
+#include <gettext.h>
 #include <locale.h>
 #include <string.h>
 #include <stdlib.h>