Update git submodules

Update git submodules

* Update docs/submodules/yardstick from branch 'master'
  - Merge "[docs] Rename image tc014_pod_frase{e,}r.png"
  - [docs] Rename image tc014_pod_frase{e,}r.png

    docs/release/results/tc014-cpu-processing-speed.rst
    includes the image tc014_pod_fraser.png. This image was
    incorrectly named tc014_pod_fraseer.png.

    This patch fixes the image name so that the link is valid.

    JIRA: YARDSTICK-1416
    Change-Id: I37d8ee687f4dbd1a8b906e2934a4119f9fdd8041
    Signed-off-by: Emma Foley <emma.l.foley@intel.com>