Update JGit to latest stable-5.7 revision

No functional change is included; this is only to keep up to
date with the latest revision.

916b367c2 - Bump Bazel version to 3.1.0

Change-Id: I7a0818cc53fac371aa3e49d1620ea561d723d1df
diff --git a/modules/jgit b/modules/jgit
index 9b2f8ce..e624e13 160000
--- a/modules/jgit
+++ b/modules/jgit
@@ -1 +1 @@
-Subproject commit 9b2f8ced9018dad519fefdc19d3940104b95434a
+Subproject commit e624e1310836747c15afeb411d9fd7eaee41ddae