Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "barometer: add aditional docker images to build"
  - barometer: add aditional docker images to build

    Change-Id: I7a4567df7fa20f6ee85b1787489645711f1b17ab

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 4669639..517ffdb 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 4669639e5076d617b4792aacd66a568ce6912449
+Subproject commit 517ffdb0536dd58f03e5c9dc596a3a10fdf207ed