[commit: ghc] master: Update Cabal to 1.18.0 RC2 (ef9f994)

[git at git.haskell.org]

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

On branch  : master
Link       : http://ghc.haskell.org/trac/ghc/changeset/ef9f9947c833f4dd876d1ebc9ce642481643e7a3/ghc

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

commit ef9f9947c833f4dd876d1ebc9ce642481643e7a3
Author: Herbert Valerio Riedel <hvr at gnu.org>
Date:   Thu Aug 29 10:12:58 2013 +0200

    Update Cabal to 1.18.0 RC2


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

ef9f9947c833f4dd876d1ebc9ce642481643e7a3
 libraries/Cabal |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libraries/Cabal b/libraries/Cabal
index 85cb83d..9f374ab 160000
--- a/libraries/Cabal
+++ b/libraries/Cabal
@@ -1 +1 @@
-Subproject commit 85cb83d7d8dbc8e59e20d31323e660608eb52557
+Subproject commit 9f374ab45e62924506b992db9157c970c7259a03