RFR: JDK-8301833: Add manual tests for FDLIBM porting

[Brian Burkhalter]

On Mon, 6 Feb 2023 01:50:55 GMT, Joe Darcy <darcy at openjdk.org> wrote:

> To help add assurances that the main-line port of FDLIBM to Java is working correctly, added some long-running manual tests to probe that the transliteration port and the corresponding StrictMath method are in agreement on a large number of argument, say, all float values.
> 
> To test the transliteration port, this test can be run against a build where the JDK has *not* had the FDLIBM code used for StrictMath ported to Java.

test/jdk/java/lang/StrictMath/FdlibmTranslit.java line 89:

> 87:     }
> 88: 
> 89:     public static double exp(double x) {

Perhaps leave out of this PR any `FdlibmTranslit` changes and later include `ExhaustingTest` changes in each separate PR for the functions being ported?

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PR: https://git.openjdk.org/jdk/pull/12430