[GHC] #9749: ghc -M 7.8 does not add underscores when -dep-suffix is used

[GHC]

#9749: ghc -M 7.8 does not add underscores when -dep-suffix is used
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              Reporter:  nh2         |            Owner:
                  Type:  bug         |           Status:  new
              Priority:  normal      |        Milestone:  7.8.4
             Component:  Build       |          Version:  7.8.3
  System                             |         Keywords:
            Resolution:              |     Architecture:  Unknown/Multiple
      Operating System:              |       Difficulty:  Easy (less than 1
  Unknown/Multiple                   |  hour)
       Type of failure:              |       Blocked By:
  None/Unknown                       |  Related Tickets:  #7381
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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Changes (by nh2):

 * related:  7381 => #7381


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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9749#comment:1>
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