[commit: ghc] master: stm: update submodule for #9169 addition (8afdf27)

[git at git.haskell.org]

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

On branch  : master
Link       : http://ghc.haskell.org/trac/ghc/changeset/8afdf274194e77e85e6a08dc4963022c56fc29d8/ghc

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

commit 8afdf274194e77e85e6a08dc4963022c56fc29d8
Author: Austin Seipp <austin at well-typed.com>
Date:   Mon Dec 15 09:34:05 2014 -0600

    stm: update submodule for #9169 addition
    
    Signed-off-by: Austin Seipp <austin at well-typed.com>


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

8afdf274194e77e85e6a08dc4963022c56fc29d8
 libraries/stm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libraries/stm b/libraries/stm
index 6b63e91..ed5d29d 160000
--- a/libraries/stm
+++ b/libraries/stm
@@ -1 +1 @@
-Subproject commit 6b63e91b2b0b7d7b4bef654117da62c22cac34da
+Subproject commit ed5d29d1e8c658427728ff1d9dece2ddd3bba8e9