[Rpm-metadata] two additional bits of data

[seth vidal]

> The former, you mean?

yah. I did mean the former. Sorry.


> Build timestamps aren't referenced explicitly in debs, but all debs are
> required to have a changelog with change dates in standardized format.
> 
> If I were required to provide buildtime for debs, I'd use the changelog
> date.

I was thinking of wanting this metadata for something like 'recent'
packages listings.

-sv