[GHC] #10660: .dyn_o isn't generated for .hsig files with -dynamic-too

[GHC]

#10660: .dyn_o isn't generated for .hsig files with -dynamic-too
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              Reporter:  spinda      |             Owner:
                  Type:  bug         |            Status:  new
              Priority:  normal      |         Milestone:
             Component:  Compiler    |           Version:  7.10.1
              Keywords:              |  Operating System:  Unknown/Multiple
          Architecture:              |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
             Test Case:              |        Blocked By:
              Blocking:              |   Related Tickets:
Differential Revisions:              |
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 This causes the linker to error out later on, as it expects a .dyn_o file
 to exist for each .hsig file.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10660>
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