Update gtest-parallel-wrapper.py to deal with changes in gtest-parallel.

Needed after https://github.com/google/gtest-parallel/commit/76767784389ed944027630759723b7d142cf2a5e

BUG=None

Review-Url: https://codereview.webrtc.org/3011103002
Cr-Commit-Position: refs/heads/master@{#19749}
diff --git a/tools_webrtc/gtest-parallel-wrapper.py b/tools_webrtc/gtest-parallel-wrapper.py
index b39bda6..cbcf0cf 100755
--- a/tools_webrtc/gtest-parallel-wrapper.py
+++ b/tools_webrtc/gtest-parallel-wrapper.py
@@ -143,7 +143,7 @@
   output_dir = get_output_dir(gtest_parallel_args)
   if output_dir:
     for test_status in 'passed', 'failed', 'interrupted':
-      logs_dir = os.path.join(output_dir, test_status)
+      logs_dir = os.path.join(output_dir, 'gtest-parallel-logs', test_status)
       if not os.path.isdir(logs_dir):
         continue
       logs = [os.path.join(logs_dir, log) for log in os.listdir(logs_dir)]