Make a constraint synonym for repeated BinaryStringRep and use it.
Make a constraint synonym for repeated BinaryStringRep and use it.

Test Plan: validate

Reviewers: austin, thomie, bgamari

Reviewed By: thomie, bgamari

Subscribers: thomie

Differential Revision: https://phabricator.haskell.org/D1810

sdiehl/ghc,sgillespie/ghc,vTurbine/ghc,vTurbine/ghc,vikraman/ghc,snoyberg/ghc,snoyberg/ghc,mcschroeder/ghc,mettekou/ghc,mettekou/ghc,snoyberg/ghc,sdiehl/ghc,oldmanmike/ghc,sdiehl/ghc,sdiehl/ghc,olsner/ghc,shlevy/ghc,snoyberg/ghc,tjakway/ghcjvm,oldmanmike/ghc,ezyang/ghc,mettekou/ghc,ezyang/ghc,mettekou/ghc,sgillespie/ghc,ezyang/ghc,tjakway/ghcjvm,vTurbine/ghc,sgillespie/ghc,nushio3/ghc,shlevy/ghc,sgillespie/ghc,tjakway/ghcjvm,sdiehl/ghc,shlevy/ghc,vikraman/ghc,tjakway/ghcjvm,vTurbine/ghc,snoyberg/ghc,shlevy/ghc,sgillespie/ghc,olsner/ghc,vTurbine/ghc,ezyang/ghc,nushio3/ghc,snoyberg/ghc,vikraman/ghc,vikraman/ghc,oldmanmike/ghc,tjakway/ghcjvm,olsner/ghc,sgillespie/ghc,tjakway/ghcjvm,sgillespie/ghc,tjakway/ghcjvm,mettekou/ghc,vikraman/ghc,ezyang/ghc,vTurbine/ghc,mcschroeder/ghc,sdiehl/ghc,oldmanmike/ghc,vikraman/ghc,oldmanmike/ghc,mcschroeder/ghc,shlevy/ghc,olsner/ghc,shlevy/ghc,snoyberg/ghc,mettekou/ghc,olsner/ghc,mettekou/ghc,ezyang/ghc,nushio3/ghc,olsner/ghc,nushio3/ghc,mcschroeder/ghc,mcschroeder/ghc,mcschroeder/ghc,vTurbine/ghc,oldmanmike/ghc,ezyang/ghc,nushio3/ghc,sdiehl/ghc,shlevy/ghc,vikraman/ghc,nushio3/ghc,oldmanmike/ghc,mcschroeder/ghc,nushio3/ghc,olsner/ghc