RPATH: Record support for $ORIGIN on various *BSD

All of NetBSD, FreeBSD, OpenBSD and DragonFly BSD support `$ORIGIN`,
but the last two require `-z origin` as documented at

    https://lekensteyn.nl/rpath.html

The `-z origin` option causes a flag bit to be set and has no effect if
the `RPATH` does not contain expandable tokens.
Status Job ID Name Coverage
  External
passed ghostflow-check-master

passed ghostflow-stager