Update git submodules

* Update docs/submodules/yardstick from branch 'master'
  - Merge "Adding cpu set to enable affinity for given vcpu"
  - Adding cpu set to enable affinity for given vcpu

    Change-Id: If2e079966939b7faa33d2833d81caad0a3669036
    Signed-off-by: Deepak S <deepak.s@linux.intel.com>

diff --git a/docs/submodules/yardstick b/docs/submodules/yardstick
index 1a77337..417176f 160000 (submodule)
--- a/docs/submodules/yardstick
+++ b/docs/submodules/yardstick
@@ -1 +1 @@
-Subproject commit 1a773377337cea9b238c8447d2de1b48e89baae0
+Subproject commit 417176fbaa65e6f6077613572c8bef9ca5fa68cd