upgrade commons for .gitignore/modules changes
diff --git a/common b/common
index df8327b..3c6caed 160000
--- a/common
+++ b/common
@@ -1 +1 @@
-Subproject commit df8327ba281128bd77e5738013edf51f6be4ba9f
+Subproject commit 3c6caed623736b021d3615df6376ec554640d61e