RFR: 8303799: [BACKOUT] JDK-8302801 Remove fdlibm C sources

[Brian Burkhalter]

On Wed, 8 Mar 2023 02:27:21 GMT, David Holmes <dholmes at openjdk.org> wrote:

> This reverts commit b5b5cba7feb0e7ef957fd6bef1e591fdb6fdaa9f.
> 
> Thanks.

Marked as reviewed by bpb (Reviewer).

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PR: https://git.openjdk.org/jdk/pull/12916