global-jjb to v0.49.0-4-g078af58

This downgrades global-jjb to exclude a very recent change
to python-tools-install.sh.

Signed-off-by: Lott, Christopher (cl778h) <cl778h@att.com>
Change-Id: I433150f7b9cb5edbddc20c68f078472d2a9a0968

diff --git a/global-jjb b/global-jjb
index 30fb028..078af58 160000 (submodule)
--- a/global-jjb
+++ b/global-jjb
@@ -1 +1 @@
-Subproject commit 30fb028f8fe8376c690c2e0b4e82597a8a66ea05
+Subproject commit 078af5827344078f0f38488b94071a43c2926d36