RFR: 8373062: JFR build failure with CDS disabled [v2]

[Markus Grönlund]

> Greetings,
> 
> [JDK-8365400](https://bugs.openjdk.org/browse/JDK-8365400) caused a build problem when passing build option "--disable-cds" because of missing conditionals.
> 
> Testing: manually building with "--disable-cds"
> 
> Thanks
> Markus

Markus Grönlund has updated the pull request incrementally with one additional commit since the last revision:

  post_class_load_event wrongly placed inside INCLUDE_CDS section

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/28656/files
  - new: https://git.openjdk.org/jdk/pull/28656/files/513642a6..369297f5

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=28656&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=28656&range=00-01

  Stats: 22 lines in 1 file changed: 11 ins; 11 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/28656.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28656/head:pull/28656

PR: https://git.openjdk.org/jdk/pull/28656