Sync libucl.

diff --git a/src/ucl b/src/ucl
index a50b18f7fe74bd4bfa4a73dd7b8f325824ff031b..ccbcb2a2403ee6dd9683b542f6987e8e02f560ed 160000 (submodule)
--- a/src/ucl
+++ b/src/ucl
@@ -1 +1 @@
-Subproject commit a50b18f7fe74bd4bfa4a73dd7b8f325824ff031b
+Subproject commit ccbcb2a2403ee6dd9683b542f6987e8e02f560ed