RFR: 8340189: 8339531 incorrect for Big Endian platforms

[Per Minborg]

This PR suggests fixing a problem on big-endian platforms.

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Commit messages:
 - Remove debug info
 - Add debug logs
 - Use another way for BE
 - Merge branch 'master' into mismatch-big-endian
 - Always use little endian in get operations

Changes: https://git.openjdk.org/jdk/pull/21258/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21258&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8340189
  Stats: 17 lines in 1 file changed: 0 ins; 8 del; 9 mod
  Patch: https://git.openjdk.org/jdk/pull/21258.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21258/head:pull/21258

PR: https://git.openjdk.org/jdk/pull/21258