Updated git submodules

Project: releng/builder master 1a3ab78314a8c124eab54c3e70bf0fa45f1d4d67

Merge "Update Ubuntu 14.04 GBP images"

Update Ubuntu 14.04 GBP images

- These images install a newer version of docker from
puppetlabs.
- Image set a public
  61fa9569-af8e-4d4f-8f47-9e44d016c041
  public
  Ubuntu 14.04 - gbp - 20170823-0530

Change-Id: I5282c9480009341aa5e0c580fff6e9da1bc66559
Signed-off-by: Anil Belur <abelur@linuxfoundation.org>

diff --git a/docs/submodules/releng/builder b/docs/submodules/releng/builder
index d7811c62d1c2d19a4746455ddc8eda1a8f68664f..1a3ab78314a8c124eab54c3e70bf0fa45f1d4d67 160000 (submodule)
--- a/docs/submodules/releng/builder
+++ b/docs/submodules/releng/builder
@@ -1 +1 @@
-Subproject commit d7811c62d1c2d19a4746455ddc8eda1a8f68664f
+Subproject commit 1a3ab78314a8c124eab54c3e70bf0fa45f1d4d67