Replace build_temp with build_base

Apprenty setuptools doesn't provide a build_temp like:

  temp.osver-pythonver

so use self.build_base which exists in both distutils and setuptools.

Author: rouilj

roundup/dist/command/build_doc.py

@@ -51,6 +51,7 @@ def run(self):
             return
 
         doc_dir = os.path.join('share', 'doc', 'roundup', 'html')
-        temp_dir = os.path.join(self.build_temp, 'doc')
+        import pdb; pdb.set_trace()
+        temp_dir = os.path.join(self.build_base, 'temp.doc')
         cmd = sphinx + ['-d', temp_dir, 'doc', doc_dir]
         spawn(cmd)