Revert "tests: use an older aarch64 sub-arch"

This reverts commit 4640ef589e8fddcab7aeab2c6044bc031cf33515.

This attempted workaround did not have the desired effect.
c6bfece1d5Andrew Kelley committed on 1/22/2020, 3:24:40 AMparentcbe9a51
1 file changedLine totals unavailable