Update git submodules

* Update docs/submodules/yardstick from branch 'master'
  - Merge "Enable static cgnapt functionality."
  - Enable static cgnapt functionality.

    Change-Id: Ie770ca69ebdc66589ed6ca5c25bfc9a75afb8938
    Signed-off-by: Deepak S <deepak.s@linux.intel.com>

diff --git a/docs/submodules/yardstick b/docs/submodules/yardstick
index 68bc8f1..f569b47 160000 (submodule)
--- a/docs/submodules/yardstick
+++ b/docs/submodules/yardstick
@@ -1 +1 @@
-Subproject commit 68bc8f16c9df9f6b5647239817892a7ad853df6f
+Subproject commit f569b4716dc3133d20457d1f31585bbcd1c816f0