Update JGit to 176f17d05

$ git log --oneline --no-merges ^596c445af 176f17d05
d9f75e8bb If tryLock fails to get the lock another gc has it
1691e3877 Fix GcConcurrentTest#testInterruptGc
49f527386 Don't swallow IOException in GC.PidLock#lock
a6da439b4 Check if FileLock is valid before using or releasing it
2a2a208fa Use Java 11 ProcessHandle to get pid of the current process
d789fe2f4 UploadPack: use allow-any-sha1-in-want configuration
8eee800fb Acquire file lock "gc.pid" before running gc
380f091fa Silence API errors introduced by 9424052f
5d5a0d537 Externalize strings introduced in c9552aba
37dd45e8a Silence API error introduced by 596c445a
012cb7793 Fix getPackedRefs to not throw NoSuchFileException
9424052f2 Add pack options to preserve and prune old pack files
ed2cbd9e8 Allow to perform PackedBatchRefUpdate without locking loose refs
e55bad514 Document option "core.sha1Implementation" introduced in 59029aec

Change-Id: I90c4ac50ac3fc3ddb145fea93bb9b7a7a3f94711
Release-Notes: Update JGit to 176f17d05
diff --git a/modules/jgit b/modules/jgit
index 596c445..176f17d 160000
--- a/modules/jgit
+++ b/modules/jgit
@@ -1 +1 @@
-Subproject commit 596c445af22ed9b6e0b7e35de44c127fcb8ecf7d
+Subproject commit 176f17d05ec154ce455ab2bde7429017d43d67fb