Hide warnings about field hiding in the MyersDiff code

Just suppress warning in this stable code rather then fixing names

Change-Id: I07580aa3cbdaa66852a5c919769bbd9020d78703

org.eclipse.jgit/src/org/eclipse/jgit/diff/MyersDiff.java

@@ -109,6 +109,7 @@
  * @param <S>
  *            type of sequence.
  */
+@SuppressWarnings("hiding")
 public class MyersDiff<S extends Sequence> {
 	/** Singleton instance of MyersDiff. */
 	public static final DiffAlgorithm INSTANCE = new LowLevelDiffAlgorithm() {