Move all sub uni* sub protos to one place
Move all sub uni* sub protos to one place

To make sure that all (conditional) backend code actually sees them.

No functional changes again, except maybe unbreaking the js backend
because it referred to a multi sub *before* its proto was defined,
which generally is a nono in the setting.

MasterDuke17/rakudo,salortiz/rakudo,labster/rakudo,MasterDuke17/rakudo,tbrowder/rakudo,rakudo/rakudo,rakudo/rakudo,tony-o/rakudo,labster/rakudo,rakudo/rakudo,labster/rakudo,tony-o/rakudo,tbrowder/rakudo,labster/rakudo,salortiz/rakudo,salortiz/rakudo,tbrowder/rakudo,rakudo/rakudo,MasterDuke17/rakudo,labster/rakudo,tony-o/rakudo,salortiz/rakudo,tbrowder/rakudo,tony-o/rakudo,MasterDuke17/rakudo,tony-o/rakudo,tbrowder/rakudo,rakudo/rakudo,salortiz/rakudo,labster/rakudo,salortiz/rakudo,MasterDuke17/rakudo,tony-o/rakudo,MasterDuke17/rakudo,rakudo/rakudo,tbrowder/rakudo