spec: do not run autoreconf with '--force' option
    
    Running in --force mode is not necessary and it may complicate building of
    automake in case that e.g. the automake 1.12 is installed on the system
    (e.g. the packaged up2date config.sub from tarball is then replaced by the
    older system installed /usr/share/automake-1.12/config.sub).
    
    Version: 1.13.1-7
    Resolves: #913279