Updated git submodules

Project: releng/builder master df2b7916e4735d408f61e30d96e4b641d0b57aa4

Merge "Enable parallel updates for JJB"

Enable parallel updates for JJB

With JJB 1.5.0 we now have support for running JJB update in parallel.
The --workers 0 flag tells JJB to spawn a thread for each core on the
server to run job updates with.

Change-Id: I6592da12ef19e9d25fa595eb53dd98787dd6e139
Signed-off-by: Thanh Ha <thanh.ha@linuxfoundation.org>

diff --git a/source/submodules/releng/builder b/source/submodules/releng/builder
index 079d3b0581321302f9a272fa8f734010b46afd91..df2b7916e4735d408f61e30d96e4b641d0b57aa4 160000 (submodule)
--- a/source/submodules/releng/builder
+++ b/source/submodules/releng/builder
@@ -1 +1 @@
-Subproject commit 079d3b0581321302f9a272fa8f734010b46afd91
+Subproject commit df2b7916e4735d408f61e30d96e4b641d0b57aa4