[commit: ghc] master: Update transformers submodule (d25f853)

[git at git.haskell.org]

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

On branch  : master
Link       : http://ghc.haskell.org/trac/ghc/changeset/d25f8535a0178984f29178f983536ab40cc471a8/ghc

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commit d25f8535a0178984f29178f983536ab40cc471a8
Author: Herbert Valerio Riedel <hvr at gnu.org>
Date:   Fri Nov 27 12:12:59 2015 +0100

    Update transformers submodule
    
    Most notably this pulls in `MonadFail` instances
    (see also #10751)
    
    - add MonadFail instance for ContT
    - re-order methods for consistency
    - Add `MonadFail` instances
    - Canonicalise Monad instances
    - instance Bifunctor Constant


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d25f8535a0178984f29178f983536ab40cc471a8
 libraries/transformers | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libraries/transformers b/libraries/transformers
index 5ccb747..34fba39 160000
--- a/libraries/transformers
+++ b/libraries/transformers
@@ -1 +1 @@
-Subproject commit 5ccb747e67d579e3f212fd3526469c35282e532e
+Subproject commit 34fba39b1279936a739ca8857e9592cc9a44c34e