Make the example for -M work
Make the example for -M work

`ghc` fails without `-dep-suffix ''`.

Test Plan: visual inspection

Reviewers: austin, bgamari

Reviewed By: bgamari

Subscribers: thomie, simonmar

Differential Revision: https://phabricator.haskell.org/D2075

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