The default triple of Amazon Linux on AArch64 is aarch64-amazon-linux,
see issue highlighded by PR #109263, somewhat serious linker issues are
encountered if any other triple is being used.
Unfortunately, this makes XFAIL lines like
`XFAIL: target=aarch64{{.*}}-linux-gnu` ineffective, making it
impossible to complete all of the check-cxx on Amazon Linux without
failing.