Fix core (pointed on 1.1.2 instead of 1.1.3).

Signed-off-by: Florent Bruneau <florent.bruneau@polytechnique.org>

diff --git a/core b/core
index ed4f7de..277bb52 160000 (submodule)
--- a/core
+++ b/core
@@ -1 +1 @@
-Subproject commit ed4f7de016bb136fae9f72256c827ef09d4ea863
+Subproject commit 277bb52765efb79e31092f5555a750146d379987