Query commands take subrepos into account

[peterebden]

e.g.

$ plz query revdeps //third_party/go:golang.org_x_text
<nothing>

but that doesn't seem a particularly intuitive or useful result; clearly it is depended on (if you remove that thing, it doesn't build). now it shows:

$ plz plz query revdeps //third_party/go:golang.org_x_text
///third_party/go/golang.org_x_text//secure/bidirule:bidirule
///third_party/go/golang.org_x_text//transform:transform
///third_party/go/golang.org_x_text//unicode/bidi:bidi
///third_party/go/golang.org_x_text//unicode/norm:norm

I can't see a particularly sensible way of doing this systematically (I don't think targets should get explicit dependencies on them for this), so this just spot-fixes several of the query subcommands.