Clarify/correct command line usage
cargo installs bindgen to the local bin repo and not the current directory.
@@ -151,7 +151,7 @@ include!(concat!(env!("OUT_DIR"), "/example.rs"));
$ cargo install bindgen
```
-There are a few options documented when running `./bindgen --help`.
+There are a few options documented when running `bindgen --help`. Bindgen is installed to `~/.cargo/bin`. You have to add that directory to your path to use `bindgen`.
### C++
