use "/usr/bin/env python" for shebangs for python scripts

On NetBSD, a typical path of python interpreter is /usr/pkg/bin/python.

Signed-off-by: YAMAMOTO Takashi <yamamoto@midokura.com>
Acked-by: Ben Pfaff <blp@ovn.org>

debian/ovs-monitor-ipsec

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#! /usr/bin/env python
 # Copyright (c) 2009, 2010, 2011, 2012 Nicira, Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

ofproto/ipfix-gen-entities

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#! /usr/bin/env python
 #
 # Copyright (C) 2012 Nicira, Inc.
 #

utilities/ovs-dev.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#! /usr/bin/env python
 # Copyright (c) 2013, 2014, 2015 Nicira, Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

utilities/ovs-pipegen.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#! /usr/bin/env python
 # Copyright (c) 2013, 2014, 2015 Nicira, Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

utilities/qemu-wrap.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#! /usr/bin/env python
 #
 #   BSD LICENSE
 #

vtep/ovs-vtep

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#! /usr/bin/env python
 # Copyright (C) 2013 Nicira, Inc. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

xenserver/usr_share_openvswitch_scripts_ovs-xapi-sync

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#! /usr/bin/env python
 # Copyright (c) 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");