Update git submodules

* Update docs/submodules/releng from branch 'master'
  - need to escape <, so move to include raw and shell script

    Change-Id: I7b54d303bffcbc2fefce6db135ad9efefa0e9ed3
    Signed-off-by: agardner <agardner@linuxfoundation.org>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 51a0069..860c4d1 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 51a00693d31015c58507cb8719de2030d61cf0dd
+Subproject commit 860c4d14afacf267139a020907d1a804ee62c4e7