{
  "llvm-target": "aarch64-unknown-none",
  "target-endian": "little",
  "target-pointer-width": "64",
  "target-c-int-width": "32",
  "data-layout": "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128",
  "arch": "aarch64",
  "os": "none",
  "env": "",
  "vendor": "unknown",
  "linker-flavor": "gcc",
  "target-family": "redox",
  "pre-link-args": ["-m64", "-nostdlib", "-static"],
  "features": "+a53,+strict-align,-fp-armv8",
  "dynamic-linking": false,
  "executables": false,
  "relocation-model": "pic",
  "code-model": "large",
  "disable-redzone": true,
  "eliminate-frame-pointer": false,
  "exe-suffix": "",
  "has-rpath": false,
  "no-compiler-rt": true,
  "no-default-libraries": true,
  "position-independent-executables": false,
  "has-elf-tls": true
}

Add a toolchain target spec for AArch64
Add a toolchain target spec for AArch64
