[crac] RFR: 8348867: [CRaC] Simplify CPUFeatures code [v2]

[Timofei Pushkin]

> Replaces abandoned #112, but the change set is slightly different

Timofei Pushkin has updated the pull request incrementally with two additional commits since the last revision:

 - Merge pull request #20 from jankratochvil/cpu-features
   
   src/hotspot/cpu/x86/vm_version_x86.*: Update to upstream
 - src/hotspot/cpu/x86/vm_version_x86.*: Update to upstream

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

Changes:
  - all: https://git.openjdk.org/crac/pull/194/files
  - new: https://git.openjdk.org/crac/pull/194/files/3522d598..ce15077f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=crac&pr=194&range=01
 - incr: https://webrevs.openjdk.org/?repo=crac&pr=194&range=00-01

  Stats: 19 lines in 2 files changed: 8 ins; 2 del; 9 mod
  Patch: https://git.openjdk.org/crac/pull/194.diff
  Fetch: git fetch https://git.openjdk.org/crac.git pull/194/head:pull/194

PR: https://git.openjdk.org/crac/pull/194