No need
You'll do more damage trying drill the rivets. There are couple of options but it isn't anything to worry about. Here's what I'd do. Get some thick CA adhesive (superglue) from a hobby shop and the accelerator. Run a bead along the edge of the hinge. It should wick under if there is any gap between the hinge. Spray the accelerator to lock the glue in place. From the outside you might be able to see where the glue migrated. Don't overdo it, just get some under the hinge.
Next, I would cut a piece of glass cloth 2" wide (6-8 oz) and apply to the hinge and the cowl to lock it in. That should take care of it.