sculpt_manager: accept uplink from "local" network

Be less rigid when checking for available network to support
setups where the uplink or depot repositories are provided by
another source than "wired" or "wifi" NIC services,
e.g., a virtual machine with pass-through network device.

repos/gems/src/app/sculpt_manager/model/nic_target.h

@@ -74,7 +74,9 @@ struct Sculpt::Nic_target : Noncopyable
 
 	bool nic_router_needed() const { return type() != OFF; }
 
-	bool ready() const { return type() == WIRED || type() == WIFI; }
+	bool ready() const { return type() == WIRED ||
+	                            type() == WIFI  ||
+	                            type() == LOCAL; }
 };
 
 #endif /* _MODEL__NIC_TARGET_H_ */