Dead link in LLVM Programmer's Manual

On the page at [LLVM Programmer's Manual - Other Useful References](https://llvm.org/docs/ProgrammersManual.html#other-useful-references) the link under the label "Using static and shared libraries across platforms" does not load. The URL pointed to is `http://www.fortran-2000.com/ArnaudRecipes/sharedlib.html`.

This was accessed from macOS 26.6.2 and from Firefox 155.0.1.

Open the LLVM Programmer's Manual at the Other Useful References section and verify the reported URL under “Using static and shared libraries across platforms.” Update that reference so the documentation no longer contains the dead link, then check the rendered page to confirm the reference works as intended.

Written by the indexing model from the issue text.