Use python3 for installed executable python scripts.

Fedora is a Python3-only distribution:
https://fedoraproject.org/wiki/FinalizingFedoraSwitchtoPython3

This fixes build failures where builders may strictly enforce only
python3 during a transitional phase.

Author: Carlos O'Donell <carlos@redhat.com>



diff --git a/benchtests/scripts/compare_bench.py b/benchtests/scripts/compare_bench.py
index 9a91c2649106a740..9f1ea9d85f4b833a 100755
--- a/benchtests/scripts/compare_bench.py
+++ b/benchtests/scripts/compare_bench.py
@@ -1,5 +1,5 @@
-#!/usr/bin/python
-# Copyright (C) 2015-2023 Free Software Foundation, Inc.
+#!/usr/bin/python3
+# Copyright (C) 2015-2022 Free Software Foundation, Inc.
 # This file is part of the GNU C Library.
 #
 # The GNU C Library is free software; you can redistribute it and/or
diff --git a/benchtests/scripts/import_bench.py b/benchtests/scripts/import_bench.py
index 92d9dc4fbaf08382..698c4ff81b13f697 100644
--- a/benchtests/scripts/import_bench.py
+++ b/benchtests/scripts/import_bench.py
@@ -1,5 +1,5 @@
-#!/usr/bin/python
-# Copyright (C) 2015-2023 Free Software Foundation, Inc.
+#!/usr/bin/python3
+# Copyright (C) 2015-2022 Free Software Foundation, Inc.
 # This file is part of the GNU C Library.
 #
 # The GNU C Library is free software; you can redistribute it and/or