elput: Delete output_name stringshare on error case

This actually should have been part of the previous patch which moved
setting output_name to evdev, but it got missed so add it now. This
ensures we cleanup the output_name stringshare on error.

Signed-off-by: Chris Michael <cp.michael@samsung.com>

src/lib/elput/elput_evdev.c

@@ -1303,6 +1303,7 @@ _evdev_device_create(Elput_Seat *seat, struct libinput_device *device)
    return edev;
 
 err:
+   eina_stringshare_del(edev->output_name);
    free(edev);
    return NULL;
 }