[GHC] #15230: unix tests fail under CircleCI's fedora environment

[GHC]

#15230: unix tests fail under CircleCI's fedora environment
-------------------------------------+-------------------------------------
        Reporter:  bgamari           |                Owner:  bgamari
            Type:  bug               |               Status:  patch
        Priority:  high              |            Milestone:  8.6.1
       Component:  Continuous        |              Version:  8.4.3
  Integration                        |
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D4851
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by bgamari):

 I've committed this and updated the `linux-x86_64-fedora` image on
 DockerHub.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15230#comment:5>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler