Preserve symlinks in WebRTC.framework to avoid bundle signing failure

crates/live_kit_client/build.rs

@@ -128,9 +128,20 @@ fn swift_package_root() -> PathBuf {
 }
 
 fn copy_dir(source: &Path, destination: &Path) {
+    assert!(
+        Command::new("rm")
+            .arg("-rf")
+            .arg(destination)
+            .status()
+            .unwrap()
+            .success(),
+        "could not remove {:?} before copying",
+        destination
+    );
+
     assert!(
         Command::new("cp")
-            .arg("-r")
+            .arg("-R")
             .args(&[source, destination])
             .status()
             .unwrap()