Add List.sort(&by) candidate
Add List.sort(&by) candidate

On reified lists, it should not have to do a copy of the list being
sorted.  Gives about a 5% gain on reified List/Array.

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