Updated libxml to v2.12.6. Verified build and sanity testing on all platforms. No issue seen
------------- Commit messages: - whitespace correction - update md file - Configure libxml on windows - configure libxml on linux - add missing headers - Update libxml to v2.12.6 Changes: https://git.openjdk.org/jfx/pull/1453/files Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1453&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8331748 Stats: 24912 lines in 115 files changed: 8485 ins; 11207 del; 5220 mod Patch: https://git.openjdk.org/jfx/pull/1453.diff Fetch: git fetch https://git.openjdk.org/jfx.git pull/1453/head:pull/1453 PR: https://git.openjdk.org/jfx/pull/1453
