[jdk11u-dev] RFR: 8320129: "top" command during jtreg failure handler does not display CPU usage on OSX

[Andrew Lu]

I backport this for parity with 11.0.24-oracle.

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Commit messages:
 - Backport 8be3e39220cd64521f4e370011958e17e5fdeaf3

Changes: https://git.openjdk.org/jdk11u-dev/pull/2597/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2597&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8320129
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2597.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2597/head:pull/2597

PR: https://git.openjdk.org/jdk11u-dev/pull/2597