net-p2p/cardano-node: Fix "reload" command of the rc script.

While there enable LTO for this port, as it benefits greatly from this
optimization. It was reported to run without issues with LTO.

Reported by: Boris Polujin <boris@zfs.ninja>

(cherry picked from commit f23cd3d99022696882e4ff7c68091037b36aa4f3)