Move %configure and associated steps to %build
    
    %configure and friends invoke code that is part of the package
    and should be in %build.
    
    If https://src.fedoraproject.org/rpms/redhat-rpm-config/pull-request/172
    is merged, %configure would start throwing an error. This change
    is proactively to avoid a later build failure. No rebuild will
    be done.