[jdk21u] RFR: 8376684: Compile OpenJDK in headless mode without required X11 libraries [v2]

[Thomas Devoogdt]

> Backport-of: 1069ccebcc32e02055985e2babfa2986a2e295ca

Thomas Devoogdt has refreshed the contents of this pull request, and previous commits have been removed. The incremental views will show differences compared to the previous content of the PR. The pull request contains one new commit since the last revision:

  Backport 1069ccebcc32e02055985e2babfa2986a2e295ca

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Changes:
  - all: https://git.openjdk.org/jdk21u/pull/482/files
  - new: https://git.openjdk.org/jdk21u/pull/482/files/c0aa66ae..cc7a52a4

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk21u&pr=482&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk21u&pr=482&range=00-01

  Stats: 0 lines in 0 files changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk21u/pull/482.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u.git pull/482/head:pull/482

PR: https://git.openjdk.org/jdk21u/pull/482