[jfx24u] RFR: 8352162: Update libxml2 to 2.13.8

[Jay Bhaskar]

A clean backport to jfx24u, only files path in the patch has been has been updated. The patch is for libxml and libxslt upgrade as in mainline.

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Commit messages:
 - Backport 4df2326391b3528c48a4594ec9f3bb6fdde9a437

Changes: https://git.openjdk.org/jfx24u/pull/24/files
  Webrev: https://webrevs.openjdk.org/?repo=jfx24u&pr=24&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8352162
  Stats: 102505 lines in 192 files changed: 18274 ins; 49395 del; 34836 mod
  Patch: https://git.openjdk.org/jfx24u/pull/24.diff
  Fetch: git fetch https://git.openjdk.org/jfx24u.git pull/24/head:pull/24

PR: https://git.openjdk.org/jfx24u/pull/24