Print to System.err to avoid output races.

test: run-test 054
Change-Id: I40ee02b377bd982090e74238dae0fddbde126a80
diff --git a/test/054-uncaught/src/Main.java b/test/054-uncaught/src/Main.java
index 90a2311..688a2a4 100644
--- a/test/054-uncaught/src/Main.java
+++ b/test/054-uncaught/src/Main.java
@@ -41,7 +41,7 @@
         ThreadDeathHandler defHandler = new ThreadDeathHandler("DEFAULT");
         ThreadDeathHandler threadHandler = new ThreadDeathHandler("THREAD");
 
-        System.out.println("Test " + which);
+        System.err.println("Test " + which);
         switch (which) {
             case 1: {
                 Thread.setDefaultUncaughtExceptionHandler(defHandler);