Redo the work done in JDK-8285977 to use the `@spec` tag so that the IEEE floating-point standard gets listed as one of the external specifications.
------------- Commit messages: - JDK-8347605: Use spec tag to refer to IEEE 754 standard Changes: https://git.openjdk.org/jdk/pull/23082/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=23082&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8347605 Stats: 30 lines in 7 files changed: 0 ins; 0 del; 30 mod Patch: https://git.openjdk.org/jdk/pull/23082.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/23082/head:pull/23082 PR: https://git.openjdk.org/jdk/pull/23082
