Fix warning about missing serialVersionUID

Change-Id: Ia9532d1aaf92df9073c85c44ff2ca94796deefc2

org.eclipse.jgit/src/org/eclipse/jgit/api/errors/StashApplyFailureException.java

@@ -7,6 +7,8 @@ import org.eclipse.jgit.api.errors.GitAPIException;
  */
 public class StashApplyFailureException extends GitAPIException {
 
+	private static final long serialVersionUID = 1L;
+
 	/**
 	 * Create a StashApplyFailedException
 	 *