Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 64617bf4c8c954defeb63d737c25531a0c9e127b
  - Set uid and gid to 1000 in all jobs

    It works globally even if most of containers aren't
    leveraging 1000 as uid (root is allowed to write
    everywhere).

    Change-Id: I8b2892cd9abc28a87417ad90a7dca6cd16dab319
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 060f9d0..64617bf 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 060f9d0f13519e5e180038ce2baa5f8ff7009c45
+Subproject commit 64617bf4c8c954defeb63d737c25531a0c9e127b