scripts: python3: change python to python3 in shebang

(From OE-Core rev: 4b544ff388497cac82b0585f237900595523e1cb)

Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/contrib/bbvars.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by

scripts/contrib/devtool-stress.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 # devtool stress tester
 #

scripts/contrib/list-packageconfig-flags.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by

scripts/contrib/verify-homepage.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 # This script can be used to verify HOMEPAGE values for all recipes in
 # the current configuration.