Improved docs with custom logo and favicon

lib/llvm-backend/src/lib.rs

@@ -8,6 +8,8 @@
 )]
 #![cfg_attr(not(target_os = "windows"), deny(dead_code))]
 #![cfg_attr(nightly, feature(unwind_attributes))]
+#![doc(html_favicon_url = "https://wasmer.io/static/icons/favicon.ico")]
+#![doc(html_logo_url = "https://avatars3.githubusercontent.com/u/44205449?s=200&v=4")]
 
 mod backend;
 mod code;