Given https://github.com/rust-lang/rust/issues/33221 and the discussions therein, we should be using LTO on the staticlib for libxul, if for no other reason than to strip away all the parts of the standard library that we're not using, and reduce binary size generally. Activating Rust on Android isn't going to be viable without doing something about the size issues mentioned in that bug. It'll make the build take longer, though, which wouldn't be so great. Maybe we could only activate LTO when we were doing an official build.

Oops, didn't see your bug.