Auto merge of #449 - fitzgen:fix-gitignore-and-cargo-locks, r=emilio
Auto merge of #449 - fitzgen:fix-gitignore-and-cargo-locks, r=emilio

Fix .gitignore and extra crates' Cargo.lock files

The leading ./ breaks git, apparently. At least, they were still showing up as untracked files when I did git status.

r? @emilio or @Yamakaky

rust-lang/rust-bindgen,rust-lang/rust-bindgen,emilio/rust-bindgen,rust-lang/rust-bindgen,emilio/rust-bindgen,emilio/rust-bindgen,rust-lang/rust-bindgen,emilio/rust-bindgen,emilio/rust-bindgen