scripts/clang-tools: switch explicitly to Python 3

For the same reason as commit 51839e2 ("scripts: switch explicitly
to Python 3"), switch some more scripts, which I tested and confirmed
working on Python 3.

Signed-off-by: Masahiro Yamada <[email protected]>
Acked-by: Nathan Chancellor <[email protected]>

Author: masahir0y

scripts/clang-tools/gen_compile_commands.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # SPDX-License-Identifier: GPL-2.0
 #
 # Copyright (C) Google LLC, 2018

scripts/clang-tools/run-clang-tools.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # SPDX-License-Identifier: GPL-2.0
 #
 # Copyright (C) Google LLC, 2020