[crac] RFR: CRaC: criuengine.c: Use asprintf()

[Jan Kratochvil]

- suggested by Anton Kozlov

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Commit messages:
 - CRaC: criuengine.c: Use asprintf()

Changes: https://git.openjdk.org/crac/pull/114/files
 Webrev: https://webrevs.openjdk.org/?repo=crac&pr=114&range=00
  Stats: 8 lines in 1 file changed: 0 ins; 5 del; 3 mod
  Patch: https://git.openjdk.org/crac/pull/114.diff
  Fetch: git fetch https://git.openjdk.org/crac.git pull/114/head:pull/114

PR: https://git.openjdk.org/crac/pull/114