Update common submodule

sjoelund · sjoelund · commit 0cc904c6fc7c · 2015-12-08T14:20:38.000+01:00
Broke with the merge of Adeel's branch, when it was forced to an
older version.
diff --git a/common b/common
@@ -1 +1 @@
-Subproject commit ccdc6b74e470657d6d2ec0889dbf1dd4950013c8
+Subproject commit c535ec79728ac2887d46e802cfe0e5bc310acb76
