fix check-manifest

Use install_lib from setuptools instead of distutils

setup.py

@@ -21,8 +21,8 @@
 import os
 import sys
 import shutil
-from distutils.core import setup
-from distutils import command
+from setuptools.command.install_lib import install_lib
+from setuptools import setup
 from os.path import isdir, exists, join
 from os import walk
 
@@ -140,5 +140,5 @@
 EMPTY_FILE = '"""generated file, don\'t modify or your data will be lost"""\n'
 
 
-class BuildScripts(command.install_lib.install_lib):
+class BuildScripts(install_lib):
     def run(self):
@@ -144,5 +144,5 @@
     def run(self):
-        command.install_lib.install_lib.run(self)
+        install_lib.run(self)
         # manually install included directories if any
         if include_dirs:
             base = join(modname)