Make "make test" clean on newer MacOSes
Make "make test" clean on newer MacOSes

Looks like $*DISTRO.name changed from 'macosx' to 'macos" sometime
after Mojave.

labster/rakudo,rakudo/rakudo,MasterDuke17/rakudo,rakudo/rakudo,tbrowder/rakudo,salortiz/rakudo,tbrowder/rakudo,MasterDuke17/rakudo,MasterDuke17/rakudo,rakudo/rakudo,salortiz/rakudo,MasterDuke17/rakudo,labster/rakudo,salortiz/rakudo,tbrowder/rakudo,tbrowder/rakudo,labster/rakudo,MasterDuke17/rakudo,rakudo/rakudo,salortiz/rakudo,labster/rakudo,salortiz/rakudo,rakudo/rakudo,tbrowder/rakudo,rakudo/rakudo,MasterDuke17/rakudo,labster/rakudo,salortiz/rakudo,labster/rakudo,tbrowder/rakudo