RFR: 8349751: AIX build failure after upgrade pipewire to 1.3.81 [v2]

[Alexander Zvegintsev]

> Filed as a separate issue to keep the #23426 clean.
> 
> Fix is the same as in the `src/java.desktop/unix/native/libpipewire/include/spa/param/audio/raw.h` part of the [JDK-8309703](https://bugs.openjdk.org/browse/JDK-8309703)

Alexander Zvegintsev has updated the pull request incrementally with one additional commit since the last revision:

  merge "if defined"

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/23543/files
  - new: https://git.openjdk.org/jdk/pull/23543/files/91891e66..87227ff8

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=23543&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=23543&range=00-01

  Stats: 7 lines in 1 file changed: 2 ins; 4 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/23543.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23543/head:pull/23543

PR: https://git.openjdk.org/jdk/pull/23543