lib/discovery/global: fix query on ifc name
lib/discovery/global: fix query on ifc name

In a global advertisement, the interface is encoded as a name element.
When we generate the glob pattern for a specific interface name, that
interface name must also be encoded as a name element.

Change-Id: Ie8b7045f69fd2aadb381c9c526e0aacbb07ddaeb

vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref