Update git submodules

* Update docs/submodules/yardstick from branch 'master'
  - nsb_setup: fixup typo

    Change-Id: I7fcbf0a3c3f21065d82ffb23b5ea8c1e774a1d67
    Signed-off-by: Ross Brattain <ross.b.brattain@intel.com>

diff --git a/docs/submodules/yardstick b/docs/submodules/yardstick
index 229ed73..79e811f 160000 (submodule)
--- a/docs/submodules/yardstick
+++ b/docs/submodules/yardstick
@@ -1 +1 @@
-Subproject commit 229ed73bd43050eae79c9c5f626d8ca08f30394f
+Subproject commit 79e811f096f8640189fc75862535f1f0cc4773c5