[jdk17u-dev] RFR: 8304867: Explicitly disable dtrace for ppc builds

[Matthias Baesken]

backport of JDK-8304867

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Commit messages:
 - Backport ff368d504e9101e11c7182185f56255f429d31e3

Changes: https://git.openjdk.org/jdk17u-dev/pull/1338/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1338&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8304867
  Stats: 6 lines in 1 file changed: 3 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1338.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1338/head:pull/1338

PR: https://git.openjdk.org/jdk17u-dev/pull/1338