[PATCH v2 01/12] math: Use acosh from CORE-MATH

[Paul Zimmermann]

       Hi Adhemerval,

> I could be more comprehensible on the cover letter, instead of just
> 
> * Imported acosh fixes.
> 
> During testing, I have found some acosh issues running random inputs
> that Alexei/Paul has fixed.

yes that would be better.

Paul