netkitbase: warn that legal-info is not implemented

Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/netkitbase/netkitbase.mk

@@ -47,6 +47,9 @@ $(TARGET_DIR)/$(NETKITBASE_TARGET_BINARY): $(NETKITBASE_DIR)/$(NETKITBASE_BINARY
 	fi
 	touch -c $(TARGET_DIR)/$(NETKITBASE_TARGET_BINARY)
 
+netkitbase-legal-info:
+	@$(call legal-warning-pkg,netkitbase,legal-info not yet implemented)
+
 netkitbase: $(TARGET_DIR)/$(NETKITBASE_TARGET_BINARY)
 
 netkitbase-clean: