Update interface submodule.

diff --git a/interface b/interface
index 17945ee8b66c036d6cdf00884b69f17bbb9848f8..f778e84b6fd836e200be868fcaeaf73bc3bf496b 160000 (submodule)
--- a/interface
+++ b/interface
@@ -1 +1 @@
-Subproject commit 17945ee8b66c036d6cdf00884b69f17bbb9848f8
+Subproject commit f778e84b6fd836e200be868fcaeaf73bc3bf496b