RFR: JDK-8314163: os::print_hex_dump prints incorrectly for big endian platforms and unit sizes larger than 1 [v2]

[Thomas Stuefe]

> See comment. Seen on AIX. Big-endian is a pain.
> 
> Thanks to @MBaesken for testing the patch.

Thomas Stuefe has updated the pull request incrementally with one additional commit since the last revision:

  Comment changes by Aleksey
  
  Co-authored-by: Aleksey Shipilëv <shipilev at amazon.de>

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/15256/files
  - new: https://git.openjdk.org/jdk/pull/15256/files/fc2fc204..caef3d5a

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=15256&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=15256&range=00-01

  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/15256.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15256/head:pull/15256

PR: https://git.openjdk.org/jdk/pull/15256