Updated git submodules

Project: releng/builder master 86670c0807324fa25ae818d2fc1ce1592d78f495

Remove JJB Docker documentation

Remove the Docker documentation as it's out of date and the images are
very old. I haven't heard from users in recent time that there were
issues which tells me that there's likely not very many who use these
images. This simplifies our docs a bit.

Change-Id: I14803a06868913db64e0f2ae1add151a5a13df92
Signed-off-by: Thanh Ha <thanh.ha@linuxfoundation.org>

diff --git a/docs/submodules/releng/builder b/docs/submodules/releng/builder
index 5a85cab82652dbb19333fed7aa9a12dee7717b61..86670c0807324fa25ae818d2fc1ce1592d78f495 160000 (submodule)
--- a/docs/submodules/releng/builder
+++ b/docs/submodules/releng/builder
@@ -1 +1 @@
-Subproject commit 5a85cab82652dbb19333fed7aa9a12dee7717b61
+Subproject commit 86670c0807324fa25ae818d2fc1ce1592d78f495