[commit: ghc] ghc-8.6: Bump Cabal submodule (d53e51f)

[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/d53e51ffb7944881878e9e85c8c902b7c72211ba/ghc

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

commit d53e51ffb7944881878e9e85c8c902b7c72211ba
Author: Ben Gamari <ben at smart-cactus.org>
Date:   Fri Aug 3 16:33:13 2018 -0400

    Bump Cabal submodule


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

d53e51ffb7944881878e9e85c8c902b7c72211ba
 libraries/Cabal                              | 2 +-
 testsuite/tests/cabal/cabal05/cabal05.stderr | 4 ----
 2 files changed, 1 insertion(+), 5 deletions(-)

diff --git a/libraries/Cabal b/libraries/Cabal
index 8828258..6671506 160000
--- a/libraries/Cabal
+++ b/libraries/Cabal
@@ -1 +1 @@
-Subproject commit 8828258813f726150cd748433a8ad0df3310c6bc
+Subproject commit 6671506b488a0fe2079f9059a23510b35514c031
diff --git a/testsuite/tests/cabal/cabal05/cabal05.stderr b/testsuite/tests/cabal/cabal05/cabal05.stderr
index 12a7334..eb51115 100644
--- a/testsuite/tests/cabal/cabal05/cabal05.stderr
+++ b/testsuite/tests/cabal/cabal05/cabal05.stderr
@@ -1,7 +1,3 @@
-the following packages have broken abi-depends fields:
-    p
-    q
-    r
 
 T.hs:3:1: error:
     Ambiguous module name ‘Conflict’: