Update global-jjb to the latest v0.55.3

- Pull in Fix port clean up race condition

Change-Id: I48b7bd41f77671f32868d46242b26b03058ac3ad
Signed-off-by: Anil Belur <abelur@linuxfoundation.org>

diff --git a/global-jjb b/global-jjb
index 64faafae2362d36e4d5c3e8d5fe6579b9d09cf55..6b4eba38370203ded897068371a4e50255ef588b 160000 (submodule)
--- a/global-jjb
+++ b/global-jjb
@@ -1 +1 @@
-Subproject commit 64faafae2362d36e4d5c3e8d5fe6579b9d09cf55
+Subproject commit 6b4eba38370203ded897068371a4e50255ef588b