RFR: 8286582: Build fails on macos aarch64 when using --with-zlib=bundled

[Jaikiran Pai]

Can I please get a review of this change which fixes build failures on macos when using `--with-zlib=bundled`?

With this change the build now passes (tested both with bundled and system zlib variants).

tier1, tier2 and tier3 testing has been done and no related failures have been noticed.

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Commit messages:
 - fix build issues with bundled zlib on macosx

Changes: https://git.openjdk.java.net/jdk/pull/8651/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=8651&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8286582
  Stats: 34 lines in 3 files changed: 30 ins; 0 del; 4 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8651.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8651/head:pull/8651

PR: https://git.openjdk.java.net/jdk/pull/8651