Building the ipa rpms returns this:
warning: File listed twice: /usr/share/ipa/ui/extension.js
This is because of a glob:
%{_usr}/share/ipa/ui/*.js
and then more specifically:
%config(noreplace) %{_usr}/share/ipa/ui/extension.js
https://fedorahosted.org/freeipa/ticket/2253