Automatic update of common submodule

From bcb1518 to 211fa5f

diff --git a/common b/common
index bcb1518..211fa5f 160000 (submodule)
--- a/common
+++ b/common
@@ -1 +1 @@
-Subproject commit bcb1518c08c889dd7eda06936fc26cad85fac755
+Subproject commit 211fa5f2d0930dfd6891b386d42edba6d88c2a19