[sonic-sairedis] update sairedis submodule (#211, #212) (#904)

yxieca · lguohan · commit d2120449d513 · 2017-08-22T13:54:10.000-07:00
diff --git a/src/sonic-sairedis b/src/sonic-sairedis
@@ -1 +1 @@
-Subproject commit 7e70b4d63020fc9ea1aa009c264e4effab7bcda0
+Subproject commit 3f4afbbd9d7ed2f077922e0cb0d59df743e34a9a
