RFR: 8371642: TestNumberOfContinuousZeros.java fails on PPC64

[David Briemann]

Skips IR match rules for COUNT_LEADING_ZEROS_VL on PPC. Nodes are not implemented there.

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Commit messages:
 - 8371642: TestNumberOfContinuousZeros.java fails on PPC64

Changes: https://git.openjdk.org/jdk/pull/28239/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=28239&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8371642
  Stats: 4 lines in 1 file changed: 2 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/28239.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28239/head:pull/28239

PR: https://git.openjdk.org/jdk/pull/28239