Merge pull request #1963 from rust-lang-nursery/upstream

Rust needs clippy to have a Cargo.lock

Author: oli-obk

.gitignore

@@ -16,9 +16,6 @@ out
 /target/
 /clippy_lints/target/
 
-# We don't pin yet
-Cargo.lock
-
 # Generated by dogfood
 /target_recur/