Fix LD scripts syntax

[renatoalencar]

Although this syntax is supported by newer versions of GNU ld, it looks it's not supported some older releases. This seems to fix the problem and works for both older and newer versions.

Here's my version of ld, which is still the newer version for Fedora 35 https://src.fedoraproject.org/rpms/binutils

GNU ld version 2.37-10.fc35
Copyright (C) 2021 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License version 3 or (at your option) a later version.
This program has absolutely no warranty.

I have tested on the current trunk for GNU binutils and it seems to work tough, which is the same minor version.

GNU ld (GNU Binutils) 2.37.50.20211207
Copyright (C) 2021 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License version 3 or (at your option) a later version.
This program has absolutely no warranty.

[hannesm]

Thanks for your investigation and fix. @dinosaure @TheLortex could we get a 0.6.9 release with this (and #495) before the big merge of #494? I stumbled upon this issue in mirage/mirage-net-solo5#37 where OCaml-CI uses alpine-3.15.

[dinosaure]

Thanks, let's do a minor release for OpenBSD.