[commit: ghc] master: Bump arcanist-external-json-linter submodule (3befc1a)

[git at git.haskell.org]

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

On branch  : master
Link       : http://ghc.haskell.org/trac/ghc/changeset/3befc1af5d9f84a1e6b7a7eb66c949a5a50ef853/ghc

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commit 3befc1af5d9f84a1e6b7a7eb66c949a5a50ef853
Author: Ben Gamari <ben at smart-cactus.org>
Date:   Thu Oct 19 09:12:00 2017 -0400

    Bump arcanist-external-json-linter submodule


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3befc1af5d9f84a1e6b7a7eb66c949a5a50ef853
 .arc-linters/arcanist-external-json-linter | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.arc-linters/arcanist-external-json-linter b/.arc-linters/arcanist-external-json-linter
index f640b15..957f9e4 160000
--- a/.arc-linters/arcanist-external-json-linter
+++ b/.arc-linters/arcanist-external-json-linter
@@ -1 +1 @@
-Subproject commit f640b1582f799d16ff500c5f456f9d1037a432bb
+Subproject commit 957f9e4e8eb422dcb72f02f07767a1ed5969baab