Fixes to windows build

jetty-server/src/test/java/org/eclipse/jetty/server/AsyncRequestReadTest.java

@@ -359,7 +359,7 @@ public class AsyncRequestReadTest
                     break;
                 out.write(c);
             }
-            out.println();
+            out.write('\n');
         }
     }
 }

jetty-server/src/test/java/org/eclipse/jetty/server/handler/AllowSymLinkAliasCheckerTest.java

@@ -82,7 +82,10 @@ public class AllowSymLinkAliasCheckerTest
     @After
     public void teardown() throws Exception
     {
-        server.stop();
+        if( server != null )
+        {
+            server.stop();
+        }
     }
 
     private void setupRoot() throws IOException