Support for mips_24kc

[happpyface]

Hi,

Is there any solution to build qtun for mips_24kc?
or is there any plugin similar to qtun?
I get the error below:

cross build --target mips-unknown-linux-musl
   Compiling ring v0.16.20
error: failed to run custom build command for `ring v0.16.20`

Caused by:
  process didn't exit successfully: `/target/debug/build/ring-5925a6b1d83b72f0/build-script-build` (exit status: 101)
  --- stderr
  thread 'main' panicked at 'called `Option::unwrap()` on a `None` value', /cargo/registry/src/github.com-1ecc6299db9ec823/ring-0.16.20/build.rs:358:10
  note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace