[lworld] RFR: 8367912: Add unit test for LoadableDescriptors attribute with invalid entries

[Frederic Parain]

New unit test to verify the behavior of the JVM when a LoadableDescriptors attribute contains an invalid descriptor.

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Commit messages:
 - Add new unit test for LoadableDesciptors attribute with invalid entries

Changes: https://git.openjdk.org/valhalla/pull/1598/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1598&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8367912
  Stats: 258 lines in 2 files changed: 258 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/valhalla/pull/1598.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1598/head:pull/1598

PR: https://git.openjdk.org/valhalla/pull/1598