Auto merge of #170 - jeanphilippeD:doc01, r=emilio
Auto merge of #170 - jeanphilippeD:doc01, r=emilio

Add CI build command line in contributing

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