Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Add new function to get indivial test score for aarch64

    as architecture is not considered as a constraints (unlike scenario or
    installer) we need to work on the build tag to retrieve the data

    but it is not possible to use regex directly in the API

    so retrieveing the accurate results require extra processing
     * based on build_tag, filter the results properly per scenario
     * build a table build_tag time for a given scenario
     * keep only the last 4 results
     * evaluation criteria field

    It would simplified if architecture could be declared as a constraint
    then querying the resuls will not change and not require intermediate
    steps

    JIRA: FUNCTEST-880

    Change-Id: Id4fe4f56babf0964d41e299905c804e0d837c3d7
    Signed-off-by: Morgan Richomme <morgan.richomme@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index f612c09..6860c97 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit f612c09e6fe092dc5a3d89f1ca83e7eb389cbc2d
+Subproject commit 6860c975e30daf3045f9565ea8ab82aacc2ed0f2