Upgrade JGit to ad902087
This version contains the following fix:
Ensure that GC#deleteOrphans respects pack lock
If pack or index files are guarded by a pack lock (.keep file)
deleteOrphans() should not touch the respective files protected by the
lock file. Otherwise it may interfere with PackInserter concurrently
inserting a new pack file and its index.
Bug: Issue 13544
Change-Id: I7266f7b0c164826140726b939a647489902633b9
diff --git a/modules/jgit b/modules/jgit
index a79c5b1..ad90208 160000
--- a/modules/jgit
+++ b/modules/jgit
@@ -1 +1 @@
-Subproject commit a79c5b1f1046f4b41928bc40ab433155168dacc6
+Subproject commit ad902087820c1b2b3147b45ffbac4e3804274f9c
