RFR: 8339313: 32-bit build broken

[Thomas Stuefe]

Two fixes to fix the 32-bit build.

See JBS issue and code comment for details.

I ran nNoClassDefFoundErrorTest x64 and x86 fastdebug and release. On fastdebug, the giant string test now gets silently skipped as expected.

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Commit messages:
 - fix

Changes: https://git.openjdk.org/jdk/pull/22707/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=22707&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8339313
  Stats: 11 lines in 2 files changed: 10 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/22707.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22707/head:pull/22707

PR: https://git.openjdk.org/jdk/pull/22707