[GHC] #10433: Fix load/store barriers in pre-ARMv7 builds

[GHC]

#10433: Fix load/store barriers in pre-ARMv7 builds
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        Reporter:  thoughtpolice     |                Owner:
            Type:  bug               |               Status:  patch
        Priority:  high              |            Milestone:  8.0.1
       Component:  Runtime System    |              Version:
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:  arm
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #10244            |  Differential Rev(s):  Phab:D1704
       Wiki Page:                    |
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Comment (by bgamari):

 Is there anyone who could test Phab:D1704?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10433#comment:6>
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