[jdk21u-dev] RFR: 8318737: Fallback linker passes bad JNI handle

[Aleksey Shipilev]

Clean backport to fix Panama's fallback linker.

Additional testing:
 - [x] Linux x86 server fastdebug, `java/foreign`

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Commit messages:
 - Backport 3885dc5b9acf08dc90397ab02b814bc72d7b4ed5

Changes: https://git.openjdk.org/jdk21u-dev/pull/267/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=267&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8318737
  Stats: 38 lines in 7 files changed: 22 ins; 6 del; 10 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/267.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/267/head:pull/267

PR: https://git.openjdk.org/jdk21u-dev/pull/267