RFR: 8329816: Add SLEEF version 3.6

[Mikael Vidstedt]

On Fri, 10 May 2024 22:32:29 GMT, Mikael Vidstedt <mikael at openjdk.org> wrote:

> [JDK-8312425](https://bugs.openjdk.org/browse/JDK-8312425) is looking to optimize vector math operations by leveraging the SLEEF library. For legal reasons the actual contribution of the SLEEF files needs to be handled separately. This enhancement adds the relevant files, enabling the rest of [JDK-8312425](https://bugs.openjdk.org/browse/JDK-8312425) to move forward.

Thank you Hamlin. I'll try to keep my eyes open for the announcement of the upcoming SLEEF release but do feel free to notify me if you see it first!

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PR Comment: https://git.openjdk.org/jdk/pull/19185#issuecomment-2117988886