[GHC] #10238: Update libffi shortly before first GHC 7.12.1 RC

[GHC]

#10238: Update libffi shortly before first GHC 7.12.1 RC
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        Reporter:  hvr               |                Owner:  hvr
            Type:  task              |               Status:  new
        Priority:  highest           |            Milestone:  8.0.1
       Component:  Runtime System    |              Version:
      Resolution:                    |             Keywords:  libffi
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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Comment (by hvr):

 libffi-3.2.1 is still

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10238#comment:3>
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