[commit: ghc] ghc-8.4: Another Cabal submodule bump (201a557)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/ghc

On branch  : ghc-8.4
Link       : http://ghc.haskell.org/trac/ghc/changeset/201a5570bbc87ee740b63369edbd637141867144/ghc

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commit 201a5570bbc87ee740b63369edbd637141867144
Author: Ben Gamari <ben at smart-cactus.org>
Date:   Tue Mar 6 11:11:51 2018 -0500

    Another Cabal submodule bump


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201a5570bbc87ee740b63369edbd637141867144
 libraries/Cabal | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libraries/Cabal b/libraries/Cabal
index 728ad1a..ccd0c59 160000
--- a/libraries/Cabal
+++ b/libraries/Cabal
@@ -1 +1 @@
-Subproject commit 728ad1a1e066da453ae13ee479629c00d8c2f32d
+Subproject commit ccd0c59bec88b179c06b65df3247d8664b38e44e