[jvm] Update binder to look for 'is rw' flag
[jvm] Update binder to look for 'is rw' flag

This doesn't work for all cases, since the nqp op 'isrwcont' isn't
fully functional, yet. Compare https://github.com/perl6/nqp/issues/385

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