[lworld] RFR: 8240863: Update .jcheck/conf for Valhalla lworld branch

[Robin Westberg]

Hi all,

Please review this change that updates the jcheck configuration to work with the Skara tooling.

Best regards,
Robin

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Commit messages:
 - Remove control characters
 - Initial jcheck configuration

Changes: https://git.openjdk.java.net/valhalla/pull/1/files
 Webrev: https://webrevs.openjdk.java.net/valhalla/1/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8240863
  Stats: 35 lines in 1 file changed: 33 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/1.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/1/head:pull/1

PR: https://git.openjdk.java.net/valhalla/pull/1