Include files from webrtc/.. paths in test/

BUG=1662
R=kjellander@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/1549004

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@4105 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/test/testsupport/perf_test.cc b/test/testsupport/perf_test.cc
index 12d2bbb..3266bb7 100644
--- a/test/testsupport/perf_test.cc
+++ b/test/testsupport/perf_test.cc
@@ -14,8 +14,8 @@
 
 #include "webrtc/test/testsupport/perf_test.h"
 
-#include <stdio.h>
 #include <sstream>
+#include <stdio.h>
 
 namespace {