RFR: 8329816: Add SLEEF version 3.6

[Mikael Vidstedt]

[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.

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Commit messages:
 - 8329816: Add SLEEF version 3.6

Changes: https://git.openjdk.org/jdk/pull/19185/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=19185&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8329816
  Stats: 14313 lines in 6 files changed: 14313 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/19185.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19185/head:pull/19185

PR: https://git.openjdk.org/jdk/pull/19185