Update PRESUBMIT.py for webrtc/{tools => rtc_tools} rename.

PRESUBMIT.py

Index: PRESUBMIT.py
diff --git a/PRESUBMIT.py b/PRESUBMIT.py
index 637dce83236ce929cd833636bd0bc442adb902d7..3cc90cc0f916522ac402f604fad27c63d4c61a69 100755
--- a/PRESUBMIT.py
+++ b/PRESUBMIT.py
@@ -471,8 +471,8 @@ def _RunPythonTests(input_api, output_api):
     return input_api.os_path.join(input_api.PresubmitLocalPath(), *args)
 
   test_directories = [
-      Join('webrtc', 'tools', 'py_event_log_analyzer'),
-      Join('webrtc', 'tools'),
+      Join('webrtc', 'rtc_tools', 'py_event_log_analyzer'),
+      Join('webrtc', 'rtc_tools'),
       Join('webrtc', 'audio', 'test', 'unittests'),
   ] + [
       root for root, _, files in os.walk(Join('tools_webrtc'))