Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "[yardstick] link to fraser release notes"
  - [yardstick] link to fraser release notes

    Change-Id: I323e7ff2904e95571823f35386960cd9ce39c036
    Signed-off-by: Ross Brattain <ross.b.brattain@intel.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 9bb11a6..8a9014a 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 9bb11a61232929151f3f59679d623beeff77abb7
+Subproject commit 8a9014ada6e562a8eaf52b4cab86890ff32de8c7