RFR: JDK-8302801: Remove fdlibm C sources

[Joe Darcy]

On Thu, 2 Mar 2023 07:12:01 GMT, Alan Bateman <alanb at openjdk.org> wrote:

> This is a great milestone to get to! Does the comment at the top of sharedRuntimeTrig.cpp need updating?

Updated several of the comments in the HotSpot sources and added a description of the transliteration process to StrictMath.

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PR: https://git.openjdk.org/jdk/pull/12821