[crac] RFR: Fix CPUFeatures crash on new->old CPU [v5]

[Jan Kratochvil]

> - reproducible on i7-1165G7 "qemu-kvm -cpu host" for a checkpoint and "qemu-kvm -cpu SandyBridge" for its restore

Jan Kratochvil has updated the pull request incrementally with one additional commit since the last revision:

  Fix github compilation signedness problem

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Changes:
  - all: https://git.openjdk.org/crac/pull/134/files
  - new: https://git.openjdk.org/crac/pull/134/files/1b24fed5..c1983089

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=crac&pr=134&range=04
 - incr: https://webrevs.openjdk.org/?repo=crac&pr=134&range=03-04

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/crac/pull/134.diff
  Fetch: git fetch https://git.openjdk.org/crac.git pull/134/head:pull/134

PR: https://git.openjdk.org/crac/pull/134