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 a85ca3a38be1fdeb..9f1ea9d85f4b833a 100755

--- a/benchtests/scripts/compare_bench.py

+++ b/benchtests/scripts/compare_bench.py

@@ -1,4 +1,4 @@

-#!/usr/bin/python

+#!/usr/bin/python3

 # Copyright (C) 2015-2022 Free Software Foundation, Inc.

 # This file is part of the GNU C Library.

 #

diff --git a/benchtests/scripts/import_bench.py b/benchtests/scripts/import_bench.py

index d8bdde7753885a4d..698c4ff81b13f697 100644

--- a/benchtests/scripts/import_bench.py

+++ b/benchtests/scripts/import_bench.py

@@ -1,4 +1,4 @@

-#!/usr/bin/python

+#!/usr/bin/python3

 # Copyright (C) 2015-2022 Free Software Foundation, Inc.

 # This file is part of the GNU C Library.

 #