RFR: 8370632: Additional libxslt 1.1.43 fixes

[Hima Bindu Meda]

Additional fixes for libxslt 1.1.43. Verified build and sanity.

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Commit messages:
 - Additional libxslt 1.1.43 fixes

Changes: https://git.openjdk.org/jfx/pull/1949/files
  Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1949&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8370632
  Stats: 213 lines in 3 files changed: 83 ins; 14 del; 116 mod
  Patch: https://git.openjdk.org/jfx/pull/1949.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1949/head:pull/1949

PR: https://git.openjdk.org/jfx/pull/1949