[commit: ghc] ghc-8.6: Bump parsec submodule (15b5347)

[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/15b5347906619048a9f017caa5076aea3047aac9/ghc

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commit 15b5347906619048a9f017caa5076aea3047aac9
Author: Ben Gamari <ben at smart-cactus.org>
Date:   Sat Aug 11 12:00:44 2018 -0400

    Bump parsec submodule


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15b5347906619048a9f017caa5076aea3047aac9
 libraries/parsec | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libraries/parsec b/libraries/parsec
index 610d7aa..34f9e98 160000
--- a/libraries/parsec
+++ b/libraries/parsec
@@ -1 +1 @@
-Subproject commit 610d7aa58bb5d436aac47b7c03fa6a0f8cb82ba7
+Subproject commit 34f9e98c64cae99abeabbd3d34cec5469f87291a