Use last version of core.

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

diff --git a/core b/core
index 9902e47..36f472d 160000 (submodule)
--- a/core
+++ b/core
@@ -1 +1 @@
-Subproject commit 9902e47b972f3dc62420773010e433f23991914d
+Subproject commit 36f472dc1d8abe2ac18079b04cf8b6a2e10522be