std: Get stdtest all passing again

This commit brings the library up-to-date in order to get all tests passing
again

src/libstd/io/stdio.rs

@@ -308,23 +308,10 @@ impl Writer for StdWriter {
 
 #[cfg(test)]
 mod tests {
-    use super::*;
-    use rt::test::run_in_newsched_task;
-
-    #[test]
-    fn smoke_uv() {
+    iotest!(fn smoke() {
         // Just make sure we can acquire handles
         stdin();
         stdout();
         stderr();
-    }
-
-    #[test]
-    fn smoke_native() {
-        do run_in_newsched_task {
-            stdin();
-            stdout();
-            stderr();
-        }
-    }
+    })
 }