Update global-jjb to v0.50.0

Change-Id: Ibabaf640c063342d8862d0f7db9517ead576396d
Signed-off-by: Anil Belur <abelur@linuxfoundation.org>

diff --git a/global-jjb b/global-jjb
index ff33e05030b95c28f28f1317f6ac713080e8a5fa..0bc70d1762dc88b90d4f9aa99a2f3bbf2b55b078 160000 (submodule)
--- a/global-jjb
+++ b/global-jjb
@@ -1 +1 @@
-Subproject commit ff33e05030b95c28f28f1317f6ac713080e8a5fa
+Subproject commit 0bc70d1762dc88b90d4f9aa99a2f3bbf2b55b078