[jdk17u-dev] RFR: 8323122: AArch64: Increase itable stub size estimate

[Dmitry Chuyko]

This is a one line safety follow-up to JDK-8307352 (AARCH64: Improve itable_stub). Original change applies cleanly.

Testing: jtreg tier1,2 on linux-aarch64.

-------------

Commit messages:
 - Backport 36f4b34f1953af736706ec67192204727808bc6c

Changes: https://git.openjdk.org/jdk17u-dev/pull/2744/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=2744&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8323122
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/2744.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/2744/head:pull/2744

PR: https://git.openjdk.org/jdk17u-dev/pull/2744