PY3: change shebang to python3 in script dir

Signed-off-by: Joe Guo <joeg@catalyst.net.nz>
Reviewed-by: Noel Power <npower@samba.org>

script/bisect-test.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # use git bisect to work out what commit caused a test failure
 # Copyright Andrew Tridgell 2010
 # released under GNU GPL v3 or later

script/compare_cc_results.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 #
 # Compare the results of native and cross-compiled configure tests

script/traffic_learner

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # Generate a traffic model from a traffic summary file
 #
 # Copyright (C) Catalyst IT Ltd. 2017

script/traffic_replay

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # Generates samba network traffic
 #
 # Copyright (C) Catalyst IT Ltd. 2017