Fixed:
  * Mis-matched overly-restrictive quad checks preventing -windows-{msvc,gnu*}
    from matching -win7- in addition to the usual -pc-
    (ee77282d80f8ef0d75ed4c4a3fad3db66c96fdb6)
    (bpo: f150d3f84d54a988432beccc070fb33e4df4a5ac)
    (#77)