RFR: 8344093: Implement JEP 501: Deprecate the 32-bit x86 Port for Removal [v5]

[Aleksey Shipilev]

On Wed, 27 Nov 2024 05:23:22 GMT, Julian Waters <jwaters at openjdk.org> wrote:

> Looks good in general. Maybe add a warning to `doc/building.md` that the linux-x86 build is now deprecated. You can actually retrofit the warning that was [added for the windows-86 build deprecation](https://github.com/openjdk/jdk/commit/29b8d3d9e73c3771f18b8d4d69e32475f17346fa) now that windows-x86 has been removed.

Updated the build docs.

> I'm also not sure about who's using `make/conf/jib-profiles.js` but when I look at it's commit history, it still seems to be supported. That probably needs some update too. I.e. remove the `windows-x86` configurations (not related to this change) and add the `--enable-deprecated-ports` configure options to the `linux-x86` and `linux-x64-zero` profiles.

`jib-profiles.js` is in Oracle's purview, we do not modify it, unless being told to. @magicus -- do you want me to do anything with `jib-profiles.js`?

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PR Comment: https://git.openjdk.org/jdk/pull/22062#issuecomment-2503210964