hikey: Use python from env

* This allow to call the scripts from a virtualenv workspace
  targeting a different python version than the one installed
  on the system

Change-Id: I756f5510bf46275661331357bc8e6d84b691a186
diff --git a/installer/hisi-idt.py b/installer/hisi-idt.py
index 832f81c..db66ef8 100644
--- a/installer/hisi-idt.py
+++ b/installer/hisi-idt.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 #-*- coding: utf-8 -*-
 
 import os
diff --git a/uefi-tools/parse-platforms.py b/uefi-tools/parse-platforms.py
index af44038..5aa4283 100755
--- a/uefi-tools/parse-platforms.py
+++ b/uefi-tools/parse-platforms.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 
 import sys, os, argparse, ConfigParser