normalize module rename info to vector in ".zo" format
normalize module rename info to vector in ".zo" format

This is related to the receent repairs for submodules and
`variable-reference->namespace'.

Merge to v5.3

original commit: 5a1bc5ad4001b1ac0203aee3852d8a5694b818d1

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