RFR: 8351277: Remove pipewire from AIX build

[Matthias Baesken]

Seems Wayland is not supported on AIX, so we most likely do not need to build pipewire on AIX and can remove it from the build.
Reason is that pipewire updates can break the AIX build, so better avoid it if possible.

To check if it works, I move the 'pipewire/include' folder away, and the build still worked on AIX.

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Commit messages:
 - JDK-8351277

Changes: https://git.openjdk.org/jdk/pull/24009/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=24009&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8351277
  Stats: 23 lines in 3 files changed: 22 ins; 1 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/24009.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24009/head:pull/24009

PR: https://git.openjdk.org/jdk/pull/24009