Update git submodules

* Update docs/submodules/yardstick from branch 'master'
  - TC008 Interrupt Affinity Fix
    The smp_affinity takes hex mask, currently it is given hex number.

    Change-Id: Id738bfe10551dad1f5df48910a230b12f50d1b3d
    JIRA: YARDSTICK-818
    Signed-off-by: Jing Zhang <jing.c.zhang@nokia.com>

diff --git a/docs/submodules/yardstick b/docs/submodules/yardstick
index 25b1bb7..07644db 160000 (submodule)
--- a/docs/submodules/yardstick
+++ b/docs/submodules/yardstick
@@ -1 +1 @@
-Subproject commit 25b1bb7046d079102f68081ce49e651e84666723
+Subproject commit 07644db4910643d6f6705c6a12c5ec612a99a33a