btsocket: use setuptools rather than distutils

This gives us the bdist_egg command that autotest needs.

TEST=python bdist_egg

Change-Id: I7a1d0292a00858e3485b9aee74b6dc898334031b
diff --git a/ b/
index aed456c..47761d6 100644
--- a/
+++ b/
@@ -2,7 +2,7 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
-from distutils.core import setup, Extension
+from setuptools import setup, Extension
 ext1 = Extension('btsocket._btsocket', sources=['src/btsocket.c'])