RFR: Only add --detailed params if no events selected

[Galder Zamarreño]

Fixes https://bugs.openjdk.org/browse/CODETOOLS-7903739

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Commit messages:
 - Only add --detailed params if no events selected

Changes: https://git.openjdk.org/jmh/pull/133/files
  Webrev: https://webrevs.openjdk.org/?repo=jmh&pr=133&range=00
  Stats: 3 lines in 1 file changed: 2 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jmh/pull/133.diff
  Fetch: git fetch https://git.openjdk.org/jmh.git pull/133/head:pull/133

PR: https://git.openjdk.org/jmh/pull/133