Add Label::Distance flag to control emit Branchshort.

Change-Id: I418024ea530ae41788c5684bb8bd2044311a99d5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2959266
Auto-Submit: Yahan Lu <yahan@iscas.ac.cn>
Reviewed-by: Brice Dobry <brice.dobry@futurewei.com>
Commit-Queue: Yahan Lu <yahan@iscas.ac.cn>
Cr-Commit-Position: refs/heads/master@{#75447}