**/*.py: use /usr/bin/env to find python

src/trusted/service_runtime/nacl_syscall_handlers_gen.py

-#!/usr/bin/python
+#!/usr/bin/env python
 # Copyright (c) 2012 The Native Client Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 #
 #  This script produces wrapped versions of syscall implementation
 #  functions.  The wrappers extract syscall arguments from where the
 #  syscall trampoline saves them.
 #
 #  Note that NaCl modules are always ILP32 and compiled with a
 #  compiler that passes all arguments on the stack, but the service
@@ skipping 329 matching lines @@
   protos = SYSCALL_LIST
   print >>output_dst, data
   PrintImplSkel(arch, protos, output_dst)
   PrintSyscallTableInitializer(protos, output_dst)
 
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv))