[crac] RFR: -XX:+ShowCPUFeatures: Fix double 0x (0x0x)

[Jan Kratochvil]

- `CPU features being used are: -XX:CPUFeatures=0x0x4ff7fff9dfcfbf7,0x0x3e6`

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Commit messages:
 - -XX:+ShowCPUFeatures: Fix double 0x (0x0x)

Changes: https://git.openjdk.org/crac/pull/127/files
 Webrev: https://webrevs.openjdk.org/?repo=crac&pr=127&range=00
  Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/crac/pull/127.diff
  Fetch: git fetch https://git.openjdk.org/crac.git pull/127/head:pull/127

PR: https://git.openjdk.org/crac/pull/127