lib/remote: Add a getter for OstreeRemote.name

Now that we’ve got a public, sealed OstreeRemote structure, we can start
carefully exposing members of it as API.

Signed-off-by: Philip Withnall <withnall@endlessm.com>

Closes: #875
Approved by: cgwalters

src/libostree/ostree-remote.h

@@ -60,4 +60,7 @@ void ostree_remote_unref (OstreeRemote *remote);
 #endif /* GI_SCANNER */
 #endif
 
+_OSTREE_PUBLIC
+const gchar *ostree_remote_get_name (OstreeRemote *remote);
+
 G_END_DECLS