[Rust] Misc docs

Author: emesare

rust/src/llvm.rs

@@ -1,3 +1,7 @@
+//! LLVM functionality exposed by the core.
+//!
+//! Also see [`crate::demangle::demangle_llvm`].
+
 use binaryninjacore_sys::*;
 use std::ffi::{c_char, c_int, CString};