core: mute all BrokenPipe errors

On windows the error message does not contain `Broken pipe`, so let's
try to find the error `kind` which should be `BrokenPipe` in all cases.

src/uucore/src/lib/mods/panic.rs

@@ -8,7 +8,7 @@ pub fn mute_sigpipe_panic() {
     let hook = panic::take_hook();
     panic::set_hook(Box::new(move |info| {
         if let Some(res) = info.payload().downcast_ref::<String>() {
-            if res.contains("Broken pipe") {
+            if res.contains("BrokenPipe") {
                 return;
             }
         }