Cross-compile Rust for OpenHarmony. Sets up the environment for cargo, cc-rs, bindgen,
cmake-rs and pkg-config from the OpenHarmony SDK.
```sh
export OHOS_SDK_NATIVE=/path/to/ohos-sdk/native
cargo ohos build -t aarch64 --release
```
The SDK can also be discovered from `DEVECO_SDK_HOME` or the standard DevEco Studio installation location
(currently only macOS)
MIT OR Apache-2.0