[submodule]: Update sonic-swss pointer (#3207)

Volodymyr Samotiy · lguohan · commit e2c8993426ef · 2019-07-23T10:00:30.000-07:00
* 63afbd5 2019-07-22 [vnetorch]: Set default VxLAN encap TTL value (#980) [Volodymyr Samotiy] Signed-off-by: Volodymyr Samotiy <volodymyrs@mellanox.com>
diff --git a/src/sonic-swss b/src/sonic-swss
@@ -1 +1 @@
-Subproject commit 7db25f716670e880a554e73e7f54470b3faea9d5
+Subproject commit 63afbd5f0c89de8ce00cf717a266381f0822ce86
