note origin of koji.arch and chmod -x the lib

koji.spec

@@ -40,7 +40,8 @@
 Name: koji
 Version: 1.16.0
 Release: %{release}%{?dist}
-License: LGPLv2
+License: LGPLv2 and GPLv2+
+# the included arch lib from yum's rpmUtils is GPLv2+
 Summary: Build system tools
 Group: Applications/System
 URL: https://pagure.io/koji

koji/arch.py

@@ -1,5 +1,5 @@
-#!/usr/bin/python
-#
+# This code is from the rpmUtils.arch module of yum
+# yum is licensed as GPLv2+
 
 import os
 import rpm