RFR: 8356182: Build fails on aarch64 without ZGC

[snake66]

jvmciCodeInstaller_aarch64.cpp references symbols defined by the ZGC unconditionally, causing the build to fail when ZGC is not included.

This work is sponsored by The FreeBSD FOundation

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

Commit messages:
 - 8356182: Build fails on aarch64 without ZGC

Changes: https://git.openjdk.org/jdk/pull/25039/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=25039&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8356182
  Stats: 2 lines in 1 file changed: 2 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/25039.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25039/head:pull/25039

PR: https://git.openjdk.org/jdk/pull/25039