[jdk11u-dev] RFR: 8248682: AArch64: Use ATTRIBUTE_ALIGNED helper

[Reka Kovacs]

Changes apply cleanly.

This PR is step 7 out of 19 in the Windows/AArch64 port.

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

Commit messages:
 - Backport 0417fcf13f7f2159499d325f2b3ace49d2643557

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/266/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=266&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8248682
  Stats: 8 lines in 2 files changed: 0 ins; 0 del; 8 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/266.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/266/head:pull/266

PR: https://git.openjdk.java.net/jdk11u-dev/pull/266