Allow warnings to migrate to rustc-1.40.0 am: 7a6bcadee4 am: 9a726a08d1

Change-Id: I55fcb54f35278c815be323a4bf746a8b4d245262
diff --git a/Android.bp b/Android.bp
index 67c1b88..72ef217 100644
--- a/Android.bp
+++ b/Android.bp
@@ -2,6 +2,7 @@
 
 rust_library_rlib {
     name: "libbyteorder",
+    deny_warnings: false,
     host_supported: true,
     crate_name: "byteorder",
     srcs: ["src/lib.rs"],