[lworld] RFR: 8371898: [lworld] CLONE - BasicImageReader getEntryNames() is stateful and cannot be called more than once

[David Beaumont]

Clone of JDK-8371898 to fix issue with getEntryNames().
Required in Valhalla to unblock JDK-8371897.

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Commit messages:
 - Copy fix from mainline

Changes: https://git.openjdk.org/valhalla/pull/1736/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1736&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8371898
  Stats: 7 lines in 1 file changed: 0 ins; 1 del; 6 mod
  Patch: https://git.openjdk.org/valhalla/pull/1736.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1736/head:pull/1736

PR: https://git.openjdk.org/valhalla/pull/1736