[crac] RFR: Fix OSX failure in SunMiscSignalTest

[Radim Vansa]

Fixes GHA failure in SunMiscSignalTest on OSX

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Commit messages:
 - Fix OSX failure in SunMiscSignalTest

Changes: https://git.openjdk.org/crac/pull/123/files
 Webrev: https://webrevs.openjdk.org/?repo=crac&pr=123&range=00
  Stats: 6 lines in 2 files changed: 4 ins; 2 del; 0 mod
  Patch: https://git.openjdk.org/crac/pull/123.diff
  Fetch: git fetch https://git.openjdk.org/crac.git pull/123/head:pull/123

PR: https://git.openjdk.org/crac/pull/123