Allow unstable

lmdb-sys/build.rs

@@ -1,3 +1,5 @@
+#![allow(unstable)]
+
 extern crate "pkg-config" as pkg_config;
 extern crate bindgen;
 extern crate gcc;

lmdb-sys/src/lib.rs

@@ -4,6 +4,7 @@
     non_camel_case_types,
     non_snake_case,
     raw_pointer_derive,
+    unstable,
    )]
 #![feature(plugin)]