Update JGit to 0.8.4.403-ga424b7a

Change-Id: Ic94df6ecf11200965fc10ac59204f46bd5a2a631
Signed-off-by: Shawn O. Pearce <sop@google.com>

gerrit-server/src/main/java/com/google/gerrit/server/patch/CharTextComparator.java

@@ -0,0 +1,29 @@
+// Copyright (C) 2010 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.google.gerrit.server.patch;
+
+import org.eclipse.jgit.diff.SequenceComparator;
+
+class CharTextComparator extends SequenceComparator<CharText> {
+  @Override
+  public boolean equals(CharText a, int ai, CharText b, int bi) {
+    return a.charAt(ai) == b.charAt(bi);
+  }
+
+  @Override
+  public int hash(CharText seq, int ptr) {
+    return seq.charAt(ptr);
+  }
+}