Integrated: 8252709: Enable JVMCI when building linux-aarch64 at Oracle

[Doug Simon]

To allow for better testing of JVMCI support on AArch64 in aid of producing a reliable GraalVM release on this platform, it should be included by default.

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Commit messages:
 - 8252709: Enable JVMCI when building linux-aarch64 at Oracle

Changes: https://git.openjdk.java.net/jdk/pull/2677/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2677&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8252709
  Stats: 1 line in 1 file changed: 0 ins; 1 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2677.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2677/head:pull/2677

PR: https://git.openjdk.java.net/jdk/pull/2677