[GHC] #12552: Merge OpenBSD fixes

[GHC]

#12552: Merge OpenBSD fixes
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        Reporter:  bgamari           |                Owner:
            Type:  task              |               Status:  merge
        Priority:  normal            |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Description changed by bgamari:

@@ -3,2 +3,0 @@
-  * ffd4029c5bc581ac749f5cdc3d8e085c80add585
-  * 3551e622ab3a833589a069b473a4dfb3f171e5b8

New description:

 Merge the following to `ghc-8.0`,
  * f9aa996f0af59f32dc7b1528ff78be41413a9c27

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12552#comment:3>
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