Update git submodules

* Update docs/submodules/releng/builder from branch 'master'
  to c792ef4c4c25a8ad8394ccbdf38b1c2ed60d9aa1
  - Enable error stack traces in dlux jobs

    We are facing a NPE which is preventing merge job from succeeding,
    which we cannot replicate in local builds. Enable stack trace
    reporting to give us a clue about what is going on.

    Change-Id: I7e7d932829c565edf46a118978d8ea032bd3f7e2
    Signed-off-by: Robert Varga <robert.varga@pantheon.tech>

diff --git a/docs/submodules/releng/builder b/docs/submodules/releng/builder
index 3556056329fc2644b807f336a896890a2d8e5d64..c792ef4c4c25a8ad8394ccbdf38b1c2ed60d9aa1 160000 (submodule)
--- a/docs/submodules/releng/builder
+++ b/docs/submodules/releng/builder
@@ -1 +1 @@
-Subproject commit 3556056329fc2644b807f336a896890a2d8e5d64
+Subproject commit c792ef4c4c25a8ad8394ccbdf38b1c2ed60d9aa1