[jdk11u-dev] RFR: 8219519: Remove linux_sparc.ad and linux_aarch64.ad

[Jie Fu]

8219519: Remove linux_sparc.ad and linux_aarch64.ad

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Commit messages:
 - Backport 26702d005b8011e9c8121a28167771cec4ac5096

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/599/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=599&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8219519
  Stats: 96 lines in 2 files changed: 0 ins; 96 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/599.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/599/head:pull/599

PR: https://git.openjdk.java.net/jdk11u-dev/pull/599