[PATCH] Better supported way to set symbol versions for legacy syscalls

[Sam James]

ping -- we've been rocking this in Gentoo for a good while now.

Any concerns?

```

commit 89b02b4b145ab489734ebcee4d111657473ba560
Author: Sam James <sam@gentoo.org>
Date:   Mon Jun 20 16:25:35 2022 +0100

    sys-apps/attr: update EAPI 7 -> 8; use real symbol versioning (fix lld, etc)

    This should finally let us fix compatibility with LLD and.. pretty much
    anything other than gcc + bfd + -fno-lto (and even then it wasn't
    technically correct).

    Big thanks to Alexander Miller for sorting it out.

    Closes: https://bugs.gentoo.org/644048
    Closes: https://bugs.gentoo.org/700116
    Thanks-to: Alexander Miller <alex.miller@gmx.de>
    Signed-off-by: Sam James <sam@gentoo.org>
```

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