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

[GHC]

#10238: Update libffi shortly before first GHC 7.12.1 RC
-------------------------------------+-------------------------------------
              Reporter:  hvr         |             Owner:  hvr
                  Type:  task        |            Status:  new
              Priority:  highest     |         Milestone:  7.12.1
             Component:  Runtime     |           Version:
  System                             |  Operating System:  Unknown/Multiple
              Keywords:  libffi      |   Type of failure:  None/Unknown
          Architecture:              |        Blocked By:
  Unknown/Multiple                   |   Related Tickets:
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
-------------------------------------+-------------------------------------
 Making this ticket so I don't forget to check for the latest libffi
 release shortly before the first RC (like I missed that "libffi-3.2.1 was
 released on November 12, 2014" which would have been in time for
 7.10.1RC1)

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10238>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler