RFR: 7903740: JMH: Perf event validation not working with skid options [v4]

[Galder Zamarreño]

> Fixes https://bugs.openjdk.org/browse/CODETOOLS-7903740

Galder Zamarreño has updated the pull request incrementally with four additional commits since the last revision:

 - Remove previous approach
 - Use trim to remove any empty spaces or carriage returns
 - Do not make it quiet otherwise there's no output
 - Try perf report from specific file

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Changes:
  - all: https://git.openjdk.org/jmh/pull/132/files
  - new: https://git.openjdk.org/jmh/pull/132/files/2a938066..7f67829d

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jmh&pr=132&range=03
 - incr: https://webrevs.openjdk.org/?repo=jmh&pr=132&range=02-03

  Stats: 15 lines in 1 file changed: 11 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jmh/pull/132.diff
  Fetch: git fetch https://git.openjdk.org/jmh.git pull/132/head:pull/132

PR: https://git.openjdk.org/jmh/pull/132