Copy the mode (permissions) for configured files.

This makes the executables executable again.

setup.py

@@ -231,6 +231,8 @@ def configure_one_file(self, infile, outfile):
                     before,
                     self.configure_values)
             )
+            # The last step is to copy the permission bits
+            shutil.copymode(infile, outfile)
 
     def substitute_values(self, string, values):
         for name, val in values.iteritems():