Adding self to various maintainers files.

Obviously will need to wait to be merged til Solomon is back.

Docker-DCO-1.1-Signed-off-by: Jessica Frazelle <jess@docker.com> (github: jfrazelle)
Yeah, feel free to add me to each of these - your choice on whether you want to be the lead or whether you want to just be the co-maintainer (whichever you choose, I'm happy to support).