[oe] Keeping patch status uptodate in patchwork

[Khem Raj]

Hi

I would like to request the patch submitter to change the status of
patches appropriately particularly case where manual intervention will
be needed

1. When you send pull request the cover letter is not marked accepted
automatically so when pull request is merged please mark it so.
2. When multiple versions of patches V1, V2, V3 are sent then the
versions that don't get applied should be marked as superseded.

It will greatly help in keeping the patchwork clean and layer
maintainers and the data it represents will be lot more relevant.

Thanks for you help

-Khem