Avoid rewriting the header (it compiles!)

Author: tamird

src/Cargo.lock

@@ -58,4 +58,3 @@ cargo = { path = "tools/cargo" }
 
 [patch.crates-io]
 rustfmt-nightly = { path = "tools/rustfmt" }
-bindgen = { path = "../../rust-bindgen" }

src/Cargo.toml

@@ -13,6 +13,7 @@ crate-type = ["dylib"]
 static-libstdcpp = []
 
 [build-dependencies]
-bindgen = "0.31.2"
+# https://github.com/rust-lang-nursery/rust-bindgen/pull/1162.
+bindgen = { git = "https://github.com/rust-lang-nursery/rust-bindgen.git", rev = "75f9e1c" }
 cc = "1.0.1"
 build_helper = { path = "../build_helper" }