[lworld] Integrated: JDK-8270316: [lworld] enable -Xcomp run in test/jdk/valhalla/valuetypes/ObjectMethods.java

[Mandy Chung]

It's a follow-up since JDK-8267932 has been resolved.

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Commit messages:
 - JDK-8270316: [lworld] enable -Xcomp run in test/jdk/valhalla/valuetypes/ObjectMethods.java

Changes: https://git.openjdk.java.net/valhalla/pull/478/files
 Webrev: https://webrevs.openjdk.java.net/?repo=valhalla&pr=478&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8270316
  Stats: 3 lines in 1 file changed: 0 ins; 3 del; 0 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/478.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/478/head:pull/478

PR: https://git.openjdk.java.net/valhalla/pull/478