RFR: JDK-8321017: Record in JFR that IEEE rounding mode was corrupted by loading a library [v2]

[Matthias Baesken]

> [JDK-8295159](https://bugs.openjdk.org/browse/JDK-8295159) added some IEEE conformance checks and corrections of the floating point environment on Linux and macOS/BSD, and later some UL logging was added too.
> However the information is not added to the JFR events, and this should be enhanced.
> The already existing NativeLibraryLoad event can be used for storing the additional information, because the IEEE conformance check and fenv  get/set  is placed in the HS dlopen_helper , where already the NativeLibraryLoad  event objects are created/commited .

Matthias Baesken has updated the pull request incrementally with one additional commit since the last revision:

  Adjust macOS coding

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Changes:
  - all: https://git.openjdk.org/jdk/pull/16903/files
  - new: https://git.openjdk.org/jdk/pull/16903/files/976d7fcd..c7e63a27

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=16903&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=16903&range=00-01

  Stats: 81 lines in 2 files changed: 19 ins; 41 del; 21 mod
  Patch: https://git.openjdk.org/jdk/pull/16903.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16903/head:pull/16903

PR: https://git.openjdk.org/jdk/pull/16903