[commit: ghc] wip/exceptions-note, wip/hadrian-import-packages, wip/splice-parsing, wip/trac-16270: Update stm submodule (713271d)

[git at git.haskell.org]

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

On branches: wip/exceptions-note,wip/hadrian-import-packages,wip/splice-parsing,wip/trac-16270
Link       : http://ghc.haskell.org/trac/ghc/changeset/713271dbb031ad27b74f1675a2e776355d0bd484/ghc

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commit 713271dbb031ad27b74f1675a2e776355d0bd484
Author: Herbert Valerio Riedel <hvr at gnu.org>
Date:   Sun Jan 27 22:35:35 2019 +0100

    Update stm submodule


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713271dbb031ad27b74f1675a2e776355d0bd484
 libraries/stm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libraries/stm b/libraries/stm
index 5f4d7c6..f9979c9 160000
--- a/libraries/stm
+++ b/libraries/stm
@@ -1 +1 @@
-Subproject commit 5f4d7c6d07a760d935c9d96e62999f1ad38a5e43
+Subproject commit f9979c926ca539362b5a2412359750e8b498e53a