RFR: 8345355: [s390x] support for z16 hardware

[Amit Kumar]

This was the output for `jdk/bin/java -XX:+Verbose --version` command on a z16 hardware: 


CPU Version as detected internally: system-z, g9-z15, ldisp_fast, extimm, pcrel_load/store, cmpb, cond_load/store, interlocked_update, txm, vectorinstr, instrext2, venh1, instrext3, venh2, out-of-support_as_of_tbd, aes128, aes192, aes256, sha1, sha256, sha512, ghash


So the issue is that z16 should be recognized as g10-z16 but instead I got g9-z15. 

This is the output with current changes: 


CPU Version as detected internally: system-z, g10-z16, ldisp_fast, extimm, pcrel_load/store, cmpb, cond_load/store, interlocked_update, txm, vectorinstr, instrext2, venh1, instrext3, venh2,bear_enh, sort_enh, nnpa_assist, storage_key_removal, vpack_decimal_enh, out-of-support_as_of_tbd, aes128, aes192, aes256, sha1, sha256, sha512, ghash

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

Commit messages:
 - z16 detection

Changes: https://git.openjdk.org/jdk/pull/22508/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=22508&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8345355
  Stats: 27 lines in 2 files changed: 17 ins; 0 del; 10 mod
  Patch: https://git.openjdk.org/jdk/pull/22508.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22508/head:pull/22508

PR: https://git.openjdk.org/jdk/pull/22508