Ignore failing test on aarch64

Author: a1phyr

src/test/ui/sanitize/hwaddress.rs

@@ -1,6 +1,9 @@
 // needs-sanitizer-support
 // needs-sanitizer-hwaddress
 //
+// FIXME(#83706): this test triggers errors on aarch64-gnu
+// ignore-aarch64-unknown-linux-gnu
+//
 // FIXME(#83989): codegen-units=1 triggers linker errors on aarch64-gnu
 // compile-flags: -Z sanitizer=hwaddress -O -g -C codegen-units=16
 //