link.Elf: avoid converting rpath data in flush()

The goal is to minimize as much as possible how much logic is inside
flush(). So let's start by moving out obvious stuff. This data can be
preformatted before flush().
2c41c453b6Andrew Kelley committed on 10/9/2024, 1:02:59 AMparente1e151d
10 files changedLine totals unavailable