Move to setuptools as distutils is now deprecated.

Upstream-Status: Submitted [https://code.launchpad.net/~tgamblin/ufw/distutils-to-setuptools]
Signed-off-by: Ross Burton <ross.burton@arm.com>

diff --git a/setup.py b/setup.py
index cb67a6a..de648d3 100644
--- a/setup.py
+++ b/setup.py
@@ -25,8 +25,8 @@
 #
 
 from __future__ import print_function
-from distutils.command.install import install as _install
-from distutils.core import setup
+from setuptools.command.install import install as _install
+from setuptools import setup
 import errno
 import os
 import re