[GHC] #11127: Update cabal submodule to 1.22.5

[GHC]

#11127: Update cabal submodule to 1.22.5
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        Reporter:  lukexi            |                Owner:
            Type:  task              |               Status:  new
        Priority:  high              |            Milestone:  7.10.3
       Component:  libraries         |              Version:
  (other)                            |
      Resolution:                    |             Keywords:
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):

 Replying to [comment:5 lukexi]:
 > Mikhail tagged a 1.22.5 release so the relevant commit is now `fb7ce39`.

 nope, he didn't...

 there's no git-signed annotated Git tag `Cabal-v1.22.5.0` yet (like there
 was for http://git.haskell.org/packages/Cabal.git/tag/Cabal-v1.22.4.0)

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11127#comment:7>
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