Pin bindgen Rust target to current default

Explicitly pin bindgen rust target to the highest stable target
currently supported by the current bindgen dependency version, 0.69.*.

This value is Rust 1.73.* and is the target that is automatically chosen by
bindgen for any Rust version greater than 1.73.*.

Since our current lowest supported rust version is 1.74, this target is
always the default target.

Signed-off-by: mulhern <amulhern@redhat.com>

Author: mulkieran

build.rs

@@ -1,8 +1,9 @@
-use bindgen::Builder;
+use bindgen::{Builder, RustTarget};
 use std::{env::var, path::PathBuf};
 
 fn main() {
     let bindings = Builder::default()
+        .rust_target(RustTarget::Stable_1_73)
         .header_contents("wrapper.h", "#include <linux/loop.h>")
         .derive_default(true)
         .generate()