[GHC] #15353: Another Cabal submodule bump

[GHC]

#15353: Another Cabal submodule bump
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           Reporter:                 |             Owner:  (none)
  quasicomputational                 |
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:  8.6.1
          Component:  Compiler       |           Version:  8.4.3
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 https://github.com/snowleopard/hadrian/issues/634 uncovered a bug in Cabal
 that bit Hadrian quite severely. The Hadrian people are working around it,
 but it'd be nice if they could rip out the hacks in CI and stop having to
 remember to point the Cabal submodule to a fixed commit. The bug has been
 fixed in Cabal HEAD now, so the only thing needed is a submodule bump in
 GHC master, please.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15353>
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