[jdk8u-dev] RFR: 8303482: Update LCMS to 2.15

Thu Aug 21 23:12:07 UTC 2025

I'd like to backport it for parity with Oracle 8u.
11u patch applies almost cleanly, except for a license update in THIRD_PARTY_README instead of lcms.md.

GHA testing passes without regressions, test failures look unrelated. Additionally tested manually with J2Ddemo.

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Depends on: https://git.openjdk.org/jdk8u-dev/pull/677

Commit messages:
 - Backport e28b210d5020fc7cc3a52c58f0a8ce14e16dd5fb

Changes: https://git.openjdk.org/jdk8u-dev/pull/678/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=678&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8303482
  Stats: 112 lines in 29 files changed: 48 ins; 11 del; 53 mod
  Patch: https://git.openjdk.org/jdk8u-dev/pull/678.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u-dev.git pull/678/head:pull/678

PR: https://git.openjdk.org/jdk8u-dev/pull/678