Building for "+v8.1a" breaks on (at least) Cortex A53 (Armv8-A) on
startup with `Illegal instruction`.
Fixes: 26609f46d9 ("rust.inc: use 'v8.1a' feature when building for aarch64 instead of 'v8'")
Building for "+v8.1a" breaks on (at least) Cortex A53 (Armv8-A) on
startup with `Illegal instruction`.
Fixes: 26609f46d9 ("rust.inc: use 'v8.1a' feature when building for aarch64 instead of 'v8'")