Update git submodules

* Update docs/submodules/yardstick from branch 'master'
  - Merge "Support traffic generator for testing more than 10 ports"
  - Support traffic generator for testing more than 10 ports

    Change-Id: I9c027af082cedbadc23b0151d403dab4e9756da4
    Signed-off-by: Deepak S <deepak.s@linux.intel.com>

diff --git a/docs/submodules/yardstick b/docs/submodules/yardstick
index 5d3d294..349366a 160000 (submodule)
--- a/docs/submodules/yardstick
+++ b/docs/submodules/yardstick
@@ -1 +1 @@
-Subproject commit 5d3d2945171bd317a9bdf252e4c668b965412c32
+Subproject commit 349366a285555f4e874ef7a827c9dbc62988a4ab