[jdk13u-dev] Integrated: 8289486: Improve XSLT XPath operators count efficiency

[Yuri Nesterenko]

backporting for parity with major releases.
Clean backport. All relevant tests passed.

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Commit messages:
 - Backport 3212dc9c6f3538e1d0bd1809efd5f33ad8b47701

Changes: https://git.openjdk.org/jdk13u-dev/pull/380/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk13u-dev&pr=380&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8289486
  Stats: 59 lines in 2 files changed: 31 ins; 4 del; 24 mod
  Patch: https://git.openjdk.org/jdk13u-dev/pull/380.diff
  Fetch: git fetch https://git.openjdk.org/jdk13u-dev pull/380/head:pull/380

PR: https://git.openjdk.org/jdk13u-dev/pull/380