Renames toolchain-arm64.cmake to toolchain-aarch64.cmake to match conventions.
Renames the test suite runs arm-xx-yy-64 to aarch64-xx-yy and arm-xx-yy-32 to arm-xx-yy.
Issue: #1569
Renames toolchain-arm64.cmake to toolchain-aarch64.cmake to match conventions.
Renames the test suite runs arm-xx-yy-64 to aarch64-xx-yy and arm-xx-yy-32 to arm-xx-yy.
Issue: #1569