There is a new buildbot check that all autotool files are generated
with the correct versions (automake 1.15.1 and autoconf 2.69).
https://builder.sourceware.org/buildbot/#/builders/gcc-autoregen
Correct one file that was generated with the wrong version.
libiberty/
* aclocal.m4: Rebuild.
-# generated automatically by aclocal 1.16.5 -*- Autoconf -*-
+# generated automatically by aclocal 1.15.1 -*- Autoconf -*-
-# Copyright (C) 1996-2021 Free Software Foundation, Inc.
+# Copyright (C) 1996-2017 Free Software Foundation, Inc.
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,