RFR: 8310982: jdk/internal/util/ArchTest.java fails after JDK-8308452 failed with Method isARM()

[Roger Riggs]

Fix a test bug when run on aarch64, it was supposed to confirm it was not running on Arm.

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Commit messages:
 - Add bugid
 - 8310982: jdk/internal/util/ArchTest.java fails after JDK-8308452 failed with "Method isARM()..."

Changes: https://git.openjdk.org/jdk/pull/14685/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14685&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8310982
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/14685.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14685/head:pull/14685

PR: https://git.openjdk.org/jdk/pull/14685