[jdk21u-dev] RFR: 8376684: Compile OpenJDK in headless mode without required X11 libraries

[Thomas Devoogdt]

https://github.com/openjdk/jdk/commit/1069ccebcc32e02055985e2babfa2986a2e295ca

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Commit messages:
 - Backport 1069ccebcc32e02055985e2babfa2986a2e295ca

Changes: https://git.openjdk.org/jdk21u-dev/pull/2604/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=2604&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8376684
  Stats: 30 lines in 5 files changed: 14 ins; 5 del; 11 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/2604.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/2604/head:pull/2604

PR: https://git.openjdk.org/jdk21u-dev/pull/2604