[commit: ghc] ghc-8.6: Bump Cabal submodule (4b094c6)

[git at git.haskell.org]

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

On branch  : ghc-8.6
Link       : http://ghc.haskell.org/trac/ghc/changeset/4b094c6df6cbc5ead462b358ab6da8682fcb13bd/ghc

>---------------------------------------------------------------

commit 4b094c6df6cbc5ead462b358ab6da8682fcb13bd
Author: Ben Gamari <ben at smart-cactus.org>
Date:   Sun Sep 16 16:55:49 2018 -0400

    Bump Cabal submodule


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4b094c6df6cbc5ead462b358ab6da8682fcb13bd
 libraries/Cabal | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libraries/Cabal b/libraries/Cabal
index b00d215..88738ba 160000
--- a/libraries/Cabal
+++ b/libraries/Cabal
@@ -1 +1 @@
-Subproject commit b00d2150b3f2d216aa7458606c9c018f9beb75a2
+Subproject commit 88738ba53070de11052c6ba8df9d1807a92583d4