[io grant] Fix IO::Spec::Win32.path and make 26x faster
[io grant] Fix IO::Spec::Win32.path and make 26x faster

- Fix a GLR bug where all path bits were showed into 2nd element of
    returned list, instead of being flattened into it
- Make consistent with IO::Spec::Unix.path and always return a Seq

rakudo/rakudo,jonathanstowe/rakudo,raydiak/rakudo,usev6/rakudo,nbrown/rakudo,awwaiid/rakudo,softmoth/rakudo,tony-o/rakudo,rakudo/rakudo,MasterDuke17/rakudo,tbrowder/rakudo,sjn/rakudo,raydiak/rakudo,Gnouc/rakudo,softmoth/rakudo,lucasbuchala/rakudo,nbrown/rakudo,Gnouc/rakudo,labster/rakudo,awwaiid/rakudo,MasterDuke17/rakudo,nbrown/rakudo,softmoth/rakudo,salortiz/rakudo,sjn/rakudo,awwaiid/rakudo,jonathanstowe/rakudo,salortiz/rakudo,raydiak/rakudo,nbrown/rakudo,jonathanstowe/rakudo,jonathanstowe/rakudo,softmoth/rakudo,softmoth/rakudo,usev6/rakudo,rakudo/rakudo,labster/rakudo,salortiz/rakudo,tony-o/rakudo,sjn/rakudo,MasterDuke17/rakudo,Gnouc/rakudo,raydiak/rakudo,tony-o/rakudo,MasterDuke17/rakudo,usev6/rakudo,usev6/rakudo,jonathanstowe/rakudo,tbrowder/rakudo,tbrowder/rakudo,sjn/rakudo,nbrown/rakudo,tony-o/rakudo,rakudo/rakudo,MasterDuke17/rakudo,lucasbuchala/rakudo,lucasbuchala/rakudo,rakudo/rakudo,Gnouc/rakudo,labster/rakudo,tony-o/rakudo,awwaiid/rakudo,labster/rakudo,rakudo/rakudo,sjn/rakudo,salortiz/rakudo,nbrown/rakudo,MasterDuke17/rakudo,tbrowder/rakudo,Gnouc/rakudo,lucasbuchala/rakudo,labster/rakudo,salortiz/rakudo,awwaiid/rakudo,tony-o/rakudo,Gnouc/rakudo,tbrowder/rakudo,usev6/rakudo,salortiz/rakudo,lucasbuchala/rakudo,labster/rakudo,tbrowder/rakudo