More shabangs changed to use env python3

tools/listDevices.py

@@ -1,4 +1,4 @@
-#!/bin/python
+#!/usr/bin/env python3
 import evdev
 from evdev import InputDevice, UInput
 from select import select

tools/traceEvdev.py

@@ -1,4 +1,4 @@
-#!/bin/python
+#!/usr/bin/env python3
 import evdev
 from evdev import InputDevice
 from select import select