scripts: run glide-vc keeping golang.org/x/net/internal
scripts: run glide-vc keeping golang.org/x/net/internal

We should run glide-vc keeping golang.org/x/net/internal to avoid build
errors that internal packages cannot be imported.

Also run glide-vc with the "--no-legal-files" option to remove
unnecessary license files.

dalbani/fleet,coreos/fleet,giantswarm/fleet,jonboulle/fleet,dalbani/fleet,endocode/fleet,dongsupark/fleet,endocode/fleet,dongsupark/fleet,dongsupark/fleet,jonboulle/fleet,coreos/fleet,giantswarm/fleet,jonboulle/fleet,giantswarm/fleet,endocode/fleet,dalbani/fleet,coreos/fleet