props: restore `gracket` entries
props: restore `gracket` entries

Although `raco test` can run the relevant tests, `gracket` causes DrDr
to serialize tests, so keep the `gracket` entries for now.

mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket