[jdk11u-dev] RFR: 8296675: Exclude linux-aarch64 in NSS tests

[Goetz Lindenmaier]

I backport this for parity with 11.0.19-oracle.

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Commit messages:
 - Backport fa8a8668a6656046d713a6b09244adfc81556d63

Changes: https://git.openjdk.org/jdk11u-dev/pull/1713/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1713&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8296675
  Stats: 7 lines in 1 file changed: 2 ins; 0 del; 5 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1713.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev pull/1713/head:pull/1713

PR: https://git.openjdk.org/jdk11u-dev/pull/1713