add purposeful failure for debugging

Author: NicholasBHubbard

spec/fpm/package/python_spec.rb

@@ -219,6 +219,7 @@ def easy_install_default(python_bin, option)
       insist { subject.architecture } == "all"
       insist { subject.dependencies } == [ ]
 
+      insist { subject.architecture } == "FAIL"
     end
   end