RFR: 8342489: compiler/c2/irTests/TestVectorizationMismatchedAccess.java fails on big-endian platforms

[Amit Kumar]

Adjust TestVectorizationMismatchedAccess.java for Big Endian Platforms

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Commit messages:
 - minimize the diff
 - Adjustment for BE platforms

Changes: https://git.openjdk.org/jdk/pull/21736/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21736&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8342489
  Stats: 31 lines in 1 file changed: 8 ins; 3 del; 20 mod
  Patch: https://git.openjdk.org/jdk/pull/21736.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21736/head:pull/21736

PR: https://git.openjdk.org/jdk/pull/21736