Update cherry-pick to skip empty commits

[RebelLion420]

I love using this script when i need to but the biggest downfall is the manual intervention for cherry-picking empty commits. I looked into it a bit and it seems theres a fairly simple solution that takes advantage of git rev-list. Something like this:

git rev-list --reverse v3.18.139..v3.18.140 . | git cherry-pick --stdin

I have tested it in place of your cherry-pick case statement and it seems to work without a hitch. If you decide to implement it would just make the workflow that much smoother.

[nathanchance]

Do the commits get picked as empty commits then or are they ignored?

[RebelLion420]

They are then ignored, similar to a git cherry-pick --skip when an empty commit is picked. I can try other situations, but as far as upstreaming goes it does the job