Bump dxcommon for depfiles updates.

The older snippets fail with Automake 1.16.

diff --git a/common b/common
index a90ed16c79278b21be93bf8dc93f6c40ee2575ea..92a89700c65e52fac8c2cace51a7112d60b3f42f 160000 (submodule)
--- a/common
+++ b/common
@@ -1 +1 @@
-Subproject commit a90ed16c79278b21be93bf8dc93f6c40ee2575ea
+Subproject commit 92a89700c65e52fac8c2cace51a7112d60b3f42f