[kernel]: update sonic-linux-kernel submodule to integrate with build

lguohan · lguohan · commit 9870695ba5cc · 2016-12-28T12:26:25.000Z
diff --git a/src/sonic-linux-kernel b/src/sonic-linux-kernel
@@ -1 +1 @@
-Subproject commit 971c8b1b7b3180ae92ce1c8e8246198a2d177709
+Subproject commit 74a38ccde0d65f7aa7b9797510fc95cd318f7919
