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.

Looks like that change is not yet in a released version of SLEEF, and in particular not in 3.6.

We do need updated approvals when we pick up new versions. Since we've gone through the process once it's typically easier/faster to do so. It will be technically easier/faster as well, now that I know how to do it and have encoded it in the createSleef.sh script.

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PR Comment: https://git.openjdk.org/jdk/pull/19185#issuecomment-2108363977