message: Update SIMD entry in Readme
diff: @@ -35,7 +35,7 @@ $ ./build.sh
  * Varargs ([no cranelift support](https://github.com/CraneStation/cranelift/issues/212))
  * libstd (needs varargs and some other stuff) ([tracked here](https://github.com/bjorn3/rustc_codegen_cranelift/issues/146))
  * u128 and i128 ([no cranelift support](https://github.com/CraneStation/cranelift/issues/354))
  -* SIMD (huge amount of work to get all intrinsics implemented, so may never be supported)
  +* SIMD ([tracked here](https://github.com/bjorn3/rustc_codegen_cranelift/issues/171))
  ## Troubleshooting
  