Update libucl.

diff --git a/src/ucl b/src/ucl
index 3ac2def147f73518c88f75c920a0022c27e019da..0d80fb8fb4c43c90e79144acdad27868828ef700 160000 (submodule)
--- a/src/ucl
+++ b/src/ucl
@@ -1 +1 @@
-Subproject commit 3ac2def147f73518c88f75c920a0022c27e019da
+Subproject commit 0d80fb8fb4c43c90e79144acdad27868828ef700