Exclude 32-bit architectures (close RHBZ#2022855)
    
    Now that https://fedoraproject.org/wiki/Changes/RetireARMv7 and
    https://fedoraproject.org/wiki/Changes/EncourageI686LeafRemoval are
    accepted for F37, there is no reason not to exclude 32-bit architectures
    (on which test failures occur). This will resolve random Koschei
    failures.