[js] Add a js-lint target.
[js] Add a js-lint target.

nbrown/rakudo,MasterDuke17/rakudo,softmoth/rakudo,salortiz/rakudo,Gnouc/rakudo,nbrown/rakudo,Gnouc/rakudo,tony-o/rakudo,labster/rakudo,Gnouc/rakudo,labster/rakudo,tbrowder/rakudo,tbrowder/rakudo,labster/rakudo,softmoth/rakudo,rakudo/rakudo,tony-o/rakudo,MasterDuke17/rakudo,salortiz/rakudo,labster/rakudo,salortiz/rakudo,tony-o/rakudo,nbrown/rakudo,tbrowder/rakudo,rakudo/rakudo,MasterDuke17/rakudo,softmoth/rakudo,softmoth/rakudo,tbrowder/rakudo,tbrowder/rakudo,salortiz/rakudo,rakudo/rakudo,MasterDuke17/rakudo,rakudo/rakudo,tony-o/rakudo,tbrowder/rakudo,Gnouc/rakudo,nbrown/rakudo,salortiz/rakudo,softmoth/rakudo,labster/rakudo,labster/rakudo,tony-o/rakudo,Gnouc/rakudo,salortiz/rakudo,nbrown/rakudo,rakudo/rakudo,tony-o/rakudo,MasterDuke17/rakudo,MasterDuke17/rakudo,nbrown/rakudo,Gnouc/rakudo,rakudo/rakudo