RFR: 8295709: Linux AArch64 builds broken after JDK-8294438

[Aleksey Shipilev]

Currently fails with:

 ```
* For target hotspot_variant-server_libjvm_objs_assembler_aarch64.o:

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

Commit messages:
 - Fix

Changes: https://git.openjdk.org/jdk/pull/10781/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10781&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8295709
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/10781.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10781/head:pull/10781

PR: https://git.openjdk.org/jdk/pull/10781