[jdk16u] Integrated: 8260380: Upgrade to LittleCMS 2.12

[Phil Race]

8260380: Upgrade to LittleCMS 2.12.
Reviewed-by: jdv, serb

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Commit messages:
 - 8260380: Upgrade to LittleCMS 2.12

Changes: https://git.openjdk.java.net/jdk16u/pull/25/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk16u&pr=25&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8260380
  Stats: 717 lines in 20 files changed: 249 ins; 286 del; 182 mod
  Patch: https://git.openjdk.java.net/jdk16u/pull/25.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk16u pull/25/head:pull/25

PR: https://git.openjdk.java.net/jdk16u/pull/25