Automatic update of common submodule

From 6bb6951 to a72faea

diff --git a/common b/common
index 6bb6951..a72faea 160000 (submodule)
--- a/common
+++ b/common
@@ -1 +1 @@
-Subproject commit 6bb695159bf15fe64d31b26dd2a07d1ba2bb7f1d
+Subproject commit a72faea054977054ec66e894fd0a07e7d6585d50