Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 46ba11449770d5c22fd8e3dca9cd89760c3dbd20
  - Merge "Revert to gsutil"
  - Revert to gsutil

    Everything is hardcoded to gsutil.
    A bigger change would be required.

    Change-Id: I5f49b83e5834294ed925c34984a4754f37c0a458
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 4bed87d..46ba114 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 4bed87d64065c1ed04a4a56109ddd1161e180868
+Subproject commit 46ba11449770d5c22fd8e3dca9cd89760c3dbd20