[crac] RFR: 8377546: [CRaC] Make CheckpointRestorePathTest.testRestoreNoImage platform-dependent

[Timofei Pushkin]

Makes `CheckpointRestorePathTest.testRestoreNoImage` expect the actual error message on non-x86 platforms.

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Commit messages:
 - Make testRestoreNoImage platform-dependent

Changes: https://git.openjdk.org/crac/pull/294/files
  Webrev: https://webrevs.openjdk.org/?repo=crac&pr=294&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8377546
  Stats: 3 lines in 1 file changed: 2 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/crac/pull/294.diff
  Fetch: git fetch https://git.openjdk.org/crac.git pull/294/head:pull/294

PR: https://git.openjdk.org/crac/pull/294