haskell-backend/src/main/native/haskell-backend: update submodule (runtimeverification#756)

rv-jenkins · ttuegel · commit 752a7cd7b59c · 2019-09-11T15:12:50.000-05:00
diff --git a/haskell-backend/src/main/native/haskell-backend b/haskell-backend/src/main/native/haskell-backend
@@ -1 +1 @@
-Subproject commit 87d598da52009b6c830bc0b86673c513d570052d
+Subproject commit 2a68d4a0fbce2d5ad55371b799e6c4621f7808a8
