Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Combine generic and external scenario determination to one"
  - Combine generic and external scenario determination to one

    Previously we were determining the impacted generic scenario by looking into
    changeset in releng-xci. Since we moved the scenarios to releng-xci-scenarios,
    this is not needed anymore and same function can be used for determining the
    scenario.

    Change-Id: I06a65599e03dff4016d0d9d78116e505d84b5061
    Signed-off-by: Fatih Degirmenci <fdegir@gmail.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 9c2f3e7..cb80aad 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 9c2f3e7d4a21c7365e70d1dfdfe6d682adb94f12
+Subproject commit cb80aad0eb95081e0c63c409c6b87d553d849576