sequencer (rebase -i): set the reflog message consistently

We already used the same reflog message as the scripted version of rebase
-i when finishing. With this commit, we do that also for all the commands
before that.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

sequencer.c

@@ -1785,6 +1785,10 @@ static int pick_commits(struct todo_list *todo_list, struct replay_opts *opts)
 			unlink(rebase_path_amend());
 		}
 		if (item->command <= TODO_SQUASH) {
+			if (is_rebase_i(opts))
+				setenv("GIT_REFLOG_ACTION", reflog_message(opts,
+					command_to_string(item->command), NULL),
+					1);
 			res = do_pick_commit(item->command, item->commit,
 					opts, is_final_fixup(todo_list));
 			if (item->command == TODO_EDIT) {