RFR: 8368349: Add library notes discussing abs and IEEE 754 operations

[Iris Clark]

On Tue, 23 Sep 2025 03:02:32 GMT, Joe Darcy <darcy at openjdk.org> wrote:

> Add apiNote linking {Math, StrictMath}.abs to the IEEE 754 abs operation.

Marked as reviewed by iris (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/27443#pullrequestreview-3256212058