[lworld] RFR: 8261264: [lworld] runtime/valhalla/inlinetypes tests fail to compile

[Harold Seigel]

Please review this small fix to have runtime/valhalla tests call method Class.isPrimitiveClass() instead of Class.isInlineClass().

Thanks, Harold

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Commit messages:
 - 8261264: [lworld] runtime/valhalla/inlinetypes tests fail to compile

Changes: https://git.openjdk.java.net/valhalla/pull/324/files
 Webrev: https://webrevs.openjdk.java.net/?repo=valhalla&pr=324&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8261264
  Stats: 4 lines in 2 files changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/324.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/324/head:pull/324

PR: https://git.openjdk.java.net/valhalla/pull/324