Add link to symlink_metadata in fs::Metadata doc

Author: CartesianDaemon

src/libstd/fs.rs

@@ -89,11 +89,12 @@ pub struct File {
 
 /// Metadata information about a file.
 ///
-/// This structure is returned from the [`metadata`] function or method and
-/// represents known metadata about a file such as its permissions, size,
-/// modification times, etc.
+/// This structure is returned from the [`metadata`] or [`symlink_metadata`]
+/// functions or methods and represents known metadata about a file such as
+/// its permissions, size, modification times, etc.
 ///
 /// [`metadata`]: fn.metadata.html
+/// [`symlink_metadata`]: fn.symlink_metadata.html
 #[stable(feature = "rust1", since = "1.0.0")]
 #[derive(Clone)]
 pub struct Metadata(fs_imp::FileAttr);