Use fmap instead of <$> (Fixes #10407)
Use fmap instead of <$> (Fixes #10407)

The <$> operator is only available in the standard Prelude in
ghc 7.10 and later.

Signed-off-by: Erik de Castro Lopo <erikd@mega-nerd.com>

Test Plan: build with ghc-7.6

Reviewers: dterei, ezyang, austin

Subscribers: bgamari, thomie

Differential Revision: https://phabricator.haskell.org/D886

GHC Trac Issues: #10407

wxwxwwxxx/ghc,gridaphobe/ghc,snoyberg/ghc,da-x/ghc,ezyang/ghc,ml9951/ghc,ezyang/ghc,AlexanderPankiv/ghc,nushio3/ghc,mcschroeder/ghc,olsner/ghc,fmthoma/ghc,mfine/ghc,urbanslug/ghc,tjakway/ghcjvm,oldmanmike/ghc,anton-dessiatov/ghc,ezyang/ghc,wxwxwwxxx/ghc,sgillespie/ghc,gridaphobe/ghc,ml9951/ghc,ghc-android/ghc,ezyang/ghc,ezyang/ghc,GaloisInc/halvm-ghc,mcschroeder/ghc,acowley/ghc,urbanslug/ghc,snoyberg/ghc,fmthoma/ghc,siddhanathan/ghc,tjakway/ghcjvm,GaloisInc/halvm-ghc,AlexanderPankiv/ghc,TomMD/ghc,urbanslug/ghc,oldmanmike/ghc,nushio3/ghc,snoyberg/ghc,sdiehl/ghc,fmthoma/ghc,vTurbine/ghc,oldmanmike/ghc,mfine/ghc,elieux/ghc,oldmanmike/ghc,sgillespie/ghc,anton-dessiatov/ghc,snoyberg/ghc,shlevy/ghc,shlevy/ghc,AlexanderPankiv/ghc,ml9951/ghc,GaloisInc/halvm-ghc,mcschroeder/ghc,TomMD/ghc,vTurbine/ghc,tjakway/ghcjvm,ghc-android/ghc,GaloisInc/halvm-ghc,ml9951/ghc,mfine/ghc,snoyberg/ghc,AlexanderPankiv/ghc,siddhanathan/ghc,siddhanathan/ghc,mettekou/ghc,nkaretnikov/ghc,siddhanathan/ghc,GaloisInc/halvm-ghc,vTurbine/ghc,mettekou/ghc,sdiehl/ghc,nkaretnikov/ghc,nushio3/ghc,acowley/ghc,siddhanathan/ghc,mettekou/ghc,olsner/ghc,TomMD/ghc,olsner/ghc,anton-dessiatov/ghc,AlexanderPankiv/ghc,fmthoma/ghc,acowley/ghc,siddhanathan/ghc,vikraman/ghc,sdiehl/ghc,olsner/ghc,ml9951/ghc,ezyang/ghc,nushio3/ghc,mettekou/ghc,ml9951/ghc,wxwxwwxxx/ghc,tjakway/ghcjvm,wxwxwwxxx/ghc,mcschroeder/ghc,sgillespie/ghc,wxwxwwxxx/ghc,mcschroeder/ghc,TomMD/ghc,elieux/ghc,oldmanmike/ghc,urbanslug/ghc,tjakway/ghcjvm,vTurbine/ghc,GaloisInc/halvm-ghc,oldmanmike/ghc,ml9951/ghc,nushio3/ghc,ghc-android/ghc,gridaphobe/ghc,da-x/ghc,shlevy/ghc,fmthoma/ghc,nkaretnikov/ghc,fmthoma/ghc,anton-dessiatov/ghc,nkaretnikov/ghc,nkaretnikov/ghc,sgillespie/ghc,ml9951/ghc,GaloisInc/halvm-ghc,ezyang/ghc,sdiehl/ghc,AlexanderPankiv/ghc,elieux/ghc,acowley/ghc,mcschroeder/ghc,gridaphobe/ghc,sdiehl/ghc,TomMD/ghc,olsner/ghc,shlevy/ghc,urbanslug/ghc,mfine/ghc,TomMD/ghc,da-x/ghc,mfine/ghc,shlevy/ghc,tjakway/ghcjvm,vTurbine/ghc,urbanslug/ghc,gridaphobe/ghc,mfine/ghc,nushio3/ghc,ghc-android/ghc,da-x/ghc,acowley/ghc,mettekou/ghc,da-x/ghc,acowley/ghc,ghc-android/ghc,sdiehl/ghc,sgillespie/ghc,sgillespie/ghc,vikraman/ghc,elieux/ghc,wxwxwwxxx/ghc,mettekou/ghc,sdiehl/ghc,mfine/ghc,vikraman/ghc,gridaphobe/ghc,olsner/ghc,vTurbine/ghc,nkaretnikov/ghc,TomMD/ghc,elieux/ghc,vTurbine/ghc,shlevy/ghc,da-x/ghc,sgillespie/ghc,mcschroeder/ghc,tjakway/ghcjvm,elieux/ghc,shlevy/ghc,gridaphobe/ghc,snoyberg/ghc,ghc-android/ghc,nushio3/ghc,olsner/ghc,fmthoma/ghc,vikraman/ghc,oldmanmike/ghc,vikraman/ghc,nkaretnikov/ghc,siddhanathan/ghc,elieux/ghc,da-x/ghc,wxwxwwxxx/ghc,anton-dessiatov/ghc,anton-dessiatov/ghc,vikraman/ghc,AlexanderPankiv/ghc,mettekou/ghc,anton-dessiatov/ghc,ghc-android/ghc,vikraman/ghc,acowley/ghc,urbanslug/ghc,snoyberg/ghc