message: Add a references to the links key in the manifest docs
  Fixes
diff: @@ -45,6 +45,21 @@ building native code. More information can be found in the build script
  build = "build.rs"
  ```
  +#### The `links` field (optional)
  +
  +This fields specifies the name of a native library that is being linked to.
  +More information can be found in the [`links`][links] section of the build
  +script guide.
  +
  +[links]: reference/build-scripts.html#the-links-manifest-key
  +
  +```toml
  +[package]
  +# ...
  +links = "foo"
  +build = "build.rs"
  +```
  +
  #### The `documentation` field (optional)
  This field specifies a URL to a website hosting the crate's documentation.
  