make dist be ?dist so if it is not there you don't get any noise

as per fedora usage guidelines
https://fedoraproject.org/wiki/Packaging:DistTag

ansible.spec

 %{!?python_sitelib: %global python_sitelib %(%{__python} -c "from distutils.sysconfig import get_python_lib; print(get_python_lib())")}
 
 Name: ansible
-Release: 1%{dist}
+Release: 1%{?dist}
 Summary: Minimal SSH command and control
 Version: 0.0.2