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)
You want to maintain all these by yourself now?  Sounds good to me, but I'm willing to continue co-maintaining them with you if you don't want to be the only one. :smile: