switch from /usr/bin/python to /usr/bin/env python. this doesn't help folks...

switch from /usr/bin/python to /usr/bin/env python. this doesn't help folks whose python path points at python3 (e.g. Arch linux) though, but I see no choice than they have to change the shebangs, as we do on Synapse.  For instance, OSX doesn't have a python2 symlink, otherwise we'd use /usr/bin/env python2 shebang.

build_shared_library.py

-#! /usr/bin/python
+#! /usr/bin/env python
 # Copyright 2015 OpenMarket Ltd
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

javascript/build.py

-#! /usr/bin/python
+#! /usr/bin/env python
 # Copyright 2015 OpenMarket Ltd
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

lib/curve25519-donna/python-src/curve25519/test/test_curve25519.py

-#! /usr/bin/python
+#! /usr/bin/env python
 
 import unittest
 

lib/curve25519-donna/python-src/curve25519/test/test_speed.py

-#! /usr/bin/python
+#! /usr/bin/env python
 
 from time import time
 from curve25519 import Private

lib/curve25519-donna/setup.py

-#! /usr/bin/python
+#! /usr/bin/env python
 
 from subprocess import Popen, PIPE
 from distutils.core import setup, Extension

python/olm.py

-#! /usr/bin/python
+#! /usr/bin/env python
 from ctypes import *
 import json
 import os

test.py

-#! /usr/bin/python
+#! /usr/bin/env python
 # Copyright 2015 OpenMarket Ltd
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

tracing/graph.py

-#! /usr/bin/python
+#! /usr/bin/env python
 
 import sys
 import yaml