try fix cross compile for 32-bit arm

Cargo.toml

@@ -25,5 +25,5 @@ tracing-subscriber = "0.3.19"
 rand = "0.8.5"
 
 [build-dependencies]
-bindgen = { version="0.71.1", default-features=true}
+bindgen = { version="0.71.1", default-features=false, features=["runtime", "which-rustfmt"]}
 cc = "1.2.10"

build.rs

@@ -22,6 +22,7 @@ fn main() {
         .header("wrapper.h")
         .parse_callbacks(Box::new(bindgen::CargoCallbacks::new()))
         .allowlist_function("ikcp_.*")
+        .use_core()
         .generate()
         .expect("Unable to generate bindings");