RFR: 8310819: [lw5] loading NonAtomic can produce completion errors

[Vicente Romero]

loading java.lang.NonAtomic can produce completion errors

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Commit messages:
 - 8310819: [lw5] loading NonAtomic can produce completion errors

Changes: https://git.openjdk.org/valhalla/pull/875/files
 Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=875&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8310819
  Stats: 11 lines in 1 file changed: 10 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/valhalla/pull/875.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/875/head:pull/875

PR: https://git.openjdk.org/valhalla/pull/875