Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 940d9670ee5e19e93d03990d808e3dac8a9ca758
  - Adding release tag

    Change-Id: Ib5beee38ff95471b10a76fdf5b593bf27431b785
    Signed-off-by: Mark Beierl <mbeierl@vmware.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 7edc61b..940d967 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 7edc61bab16b8fd815517fcbbaee032669dcd97f
+Subproject commit 940d9670ee5e19e93d03990d808e3dac8a9ca758