[jdk21u-dev] RFR: 8325647: [IR framework] Only prints stdout if exitCode is 134

[Goetz Lindenmaier]

I backport this for parity with 21.0.10-oracle.

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Commit messages:
 - Backport 3b271981662df2a7fdf04ffd75d017964425607c

Changes: https://git.openjdk.org/jdk21u-dev/pull/2196/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=2196&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8325647
  Stats: 3 lines in 1 file changed: 2 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/2196.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/2196/head:pull/2196

PR: https://git.openjdk.org/jdk21u-dev/pull/2196