RFR: 8301226: Add clamp() methods to java.lang.Math and to StrictMath [v2]

[Tagir F. Valeev]

On Sun, 5 Feb 2023 18:08:47 GMT, ExE Boss <duke at openjdk.org> wrote:

>> No. I want NaNs to go into this branch
>
> That should probably include a comment then.

@ExE-Boss I think that immediately following `isNaN` checks give enough hint that we want NaN to be here.

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PR: https://git.openjdk.org/jdk/pull/12428