update libpicofe

diff --git a/frontend/libpicofe b/frontend/libpicofe
index c668921..a8b4c53 160000 (submodule)
--- a/frontend/libpicofe
+++ b/frontend/libpicofe
@@ -1 +1 @@
-Subproject commit c668921a45b7a7f5f548d0e09836f143f56b4ae0
+Subproject commit a8b4c53d7795e4d448d88b0b8222549ede78622a