[GHC] #8701: Update libffi-tarballs to latest libffi

[GHC]

#8701: Update libffi-tarballs to latest libffi
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        Reporter:  lukexi            |            Owner:
            Type:  bug               |           Status:  closed
        Priority:  high              |        Milestone:  7.8.1
       Component:  Compiler (FFI)    |          Version:  7.8.1-rc1
      Resolution:  invalid           |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  Building GHC      |       Difficulty:  Easy (less than 1
  failed                             |  hour)
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:
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Changes (by lukexi):

 * status:  new => closed
 * resolution:   => invalid


Comment:

 Sorry, the filename was poorly chosen; this is a tar.gz of libffi HEAD
 https://github.com/atgreen/libffi. But it actually doesn't include all the
 arm patches we need yet anyway :/. I'll close this until we can get a
 working official release.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8701#comment:2>
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