Upgrade bcar submodule

diff --git a/bcar b/bcar
index 23ba2f92958c773cadd0705f36fefbf4e4d4653c..477e2be10cbf36b38ce7cfe51bf03a734a717ed6 160000 (submodule)
--- a/bcar
+++ b/bcar
@@ -1 +1 @@
-Subproject commit 23ba2f92958c773cadd0705f36fefbf4e4d4653c
+Subproject commit 477e2be10cbf36b38ce7cfe51bf03a734a717ed6