[foreign-jextract] RFR: 8242276: tools/launcher/VersionCheck.java fails for jextract

[Jorn Vernee]

Hi,

This trivial patch fixes a the tier2 VersionCheck test failure, by blacklisting jextract in the test.

Thanks,
Jorn

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Commit messages:
 - Blacklist jextract in VersionCheck

Changes: https://git.openjdk.java.net/panama-foreign/pull/103/files
 Webrev: https://webrevs.openjdk.java.net/panama-foreign/103/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8242276
  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/panama-foreign/pull/103.diff
  Fetch: git fetch https://git.openjdk.java.net/panama-foreign pull/103/head:pull/103

PR: https://git.openjdk.java.net/panama-foreign/pull/103