Upgrade JGit to 5.1.12.201910011832-r

Aligns with the version used in core Gerrit 2.16.13.

Change-Id: I7514cf27ed6f449cefa22d19b0f3a11ad87c9364
diff --git a/external_plugin_deps.bzl b/external_plugin_deps.bzl
index 3414c70..8f9e7d2 100644
--- a/external_plugin_deps.bzl
+++ b/external_plugin_deps.bzl
@@ -1,13 +1,13 @@
 load("//tools/bzl:maven_jar.bzl", "GERRIT", "MAVEN_CENTRAL", "MAVEN_LOCAL", "maven_jar")
 
-JGIT_VERSION = "5.1.11.201909031202-r"
+JGIT_VERSION = "5.1.12.201910011832-r"
 REPO = MAVEN_CENTRAL
 
 def external_plugin_deps():
     maven_jar(
         name = "jgit-http-apache",
         artifact = "org.eclipse.jgit:org.eclipse.jgit.http.apache:" + JGIT_VERSION,
-        sha1 = "e52f857da16f4aeaf4861d736f3fc8a2eb6b031f",
+        sha1 = "92ad62799dd7eb02cc8805f2e297714cc3bb5149",
         repository = REPO,
         unsign = True,
         exclude = [
@@ -19,7 +19,7 @@
     maven_jar(
         name = "jgit-lfs",
         artifact = "org.eclipse.jgit:org.eclipse.jgit.lfs:" + JGIT_VERSION,
-        sha1 = "772535caadb63866039acf6cd149939838c1d663",
+        sha1 = "bb4972c6e127c615c4b9183f95414ff2a20916cf",
         repository = REPO,
         unsign = True,
         exclude = [
@@ -31,7 +31,7 @@
     maven_jar(
         name = "jgit-lfs-server",
         artifact = "org.eclipse.jgit:org.eclipse.jgit.lfs.server:" + JGIT_VERSION,
-        sha1 = "a3344e68b00ef8a79859eebd07adf945197ba1e6",
+        sha1 = "b2d1e48f9daddc09e072e422c151384e845c1612",
         repository = REPO,
         unsign = True,
         exclude = [