[jdk11u-dev] RFR: 8289486: Improve XSLT XPath operators count efficiency

[Goetz Lindenmaier]

I backport this for parity with 11.0.17-oracle.

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Commit messages:
 - Backport 3212dc9c6f3538e1d0bd1809efd5f33ad8b47701

Changes: https://git.openjdk.org/jdk11u-dev/pull/1246/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1246&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/jdk11u-dev/pull/1246.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev pull/1246/head:pull/1246

PR: https://git.openjdk.org/jdk11u-dev/pull/1246