fix(build): properly output subdirectories like `rxjs/operators`
fix(build): properly output subdirectories like `rxjs/operators`

The last alpha publish was missing appropriate references in the build script. This adds them back.

IgorMinar/RxJS,trxcllnt/RxJS,jayphelps/rxjs,jayphelps/rxjs,martinsik/rxjs,ReactiveX/RxJS,kwonoj/RxJS,jayphelps/rxjs,Brocco/RxJS,ReactiveX/rxjs,benlesh/RxJS,trxcllnt/RxJS,Brocco/RxJS,kwonoj/RxJS,ReactiveX/RxJS,martinsik/rxjs,kwonoj/RxJS,ReactiveX/RxJS,benlesh/RxJS,benlesh/RxJS,Brocco/RxJS,ReactiveX/rxjs,ReactiveX/rxjs,kwonoj/RxJS,martinsik/rxjs,ReactiveX/rxjs,trxcllnt/RxJS,ReactiveX/RxJS,Brocco/RxJS,jayphelps/rxjs,martinsik/rxjs,trxcllnt/RxJS,benlesh/RxJS,IgorMinar/RxJS,jayphelps/rxjs