RFR: 8255766: Fix linux+arm64 build after 8254072

[Bernhard Urban-Forster]

Fixing this problem:

 1501 | assert(StackOverflow::stack_shadow_zone_size() == (int)StackOverflow::stack_shadow_zone_size(), "must be same");
Verified via a linux+arm64 slowdebug build and a windows+arm64 slowdebug build.

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Commit messages:
 - 8255766: Fix linux+arm64 build after 8254072

Changes: https://git.openjdk.java.net/jdk/pull/1013/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=1013&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8255766
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1013.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1013/head:pull/1013

PR: https://git.openjdk.java.net/jdk/pull/1013