clean up arches in fedpkg bash completeion - drop sparc - add i686 - add arm
    
      variants - add ppc64p7 (dennis)
    - Add arm7hl to bash completion arches (opensource)
    - Add more ppc64-only packages (opensource)
    - remove --push from retire command in bash completion (opensource)
    - undefine macros rather than define as nil (dennis)