RFR: 8304434: [AIX] Update minimum xlclang version

[Tyler Steele]

On Fri, 17 Mar 2023 22:36:24 GMT, Tyler Steele <tsteele at openjdk.org> wrote:

> Minor changes to the build system to recognize and warn that an incompatible toolchain is detected.

I assume you're referring to JDK-8304291[1]? I actually based these changes on the commit just prior to the one that broke so that I could test this change before opening the PR.

As a note, the changes just display a warning that the build isn't supported if the version is off. Users can still choose to build anyway.

[1] https://bugs.openjdk.org/browse/JDK-8304291

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PR Comment: https://git.openjdk.org/jdk/pull/13086#issuecomment-1481688281