[Misc] Fix improper placement of SPDX header in scripts (#12694)

Signed-off-by: Russell Bryant <rbryant@redhat.com>

tools/report_build_time_ninja.py

@@ -1,6 +1,6 @@
+#!/usr/bin/env python3
 # SPDX-License-Identifier: Apache-2.0
 
-#!/usr/bin/env python3
 # Copyright (c) 2018 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.