Update src/libstd/lib.rs
Update src/libstd/lib.rs

Co-Authored-By: Ashley Mannix <78e91391c9d2159302c86f593901891dde77bc92@live.com.au>
aidancully/rust,graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust,graydon/rust