[swss] submodule update (#604)

pavel-shirshov · Shuotian Cheng · commit d296ceadd51d · 2017-05-15T11:45:41.000-07:00
diff --git a/src/sonic-swss b/src/sonic-swss
@@ -1 +1 @@
-Subproject commit eed4a2d28b2b0d1eb1655eb74c875929ac6dbf9b
+Subproject commit 75e559a5063d9513b1fafd96d62c020e3c0a5eee
