[lworld] RFR: 8326950: [lworld] InlineTypeArray: avoid using Arrays.copyOf() until API discussed

[David Simms]

testUtilArrays: manual array copy instead

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Commit messages:
 - 8326950: [lworld] InlineTypeArray: avoid using Arrays.copyOf() until API discussed

Changes: https://git.openjdk.org/valhalla/pull/1026/files
 Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1026&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8326950
  Stats: 13 lines in 1 file changed: 12 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/valhalla/pull/1026.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1026/head:pull/1026

PR: https://git.openjdk.org/valhalla/pull/1026