RFR: 8319966: AIX: expected [[0:i4]] but found [[0:I4]] after JDK-8319882

[Per Minborg]

This PR proposes to fix a failing test on big endian architectures like AIX.

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Commit messages:
 - Fix AIX test issue

Changes: https://git.openjdk.org/jdk/pull/16672/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16672&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8319966
  Stats: 3 lines in 1 file changed: 1 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/16672.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16672/head:pull/16672

PR: https://git.openjdk.org/jdk/pull/16672