Update traffic annotations FYI bot.

Typo corrected in traffic annotations FYI bot script.

Bug: 844014
Change-Id: Ifb6109c444403a4f62c5bc58cfca53a0901a71cf
TBR: dpranke@chromium.org
Reviewed-on: https://chromium-review.googlesource.com/1095095Reviewed-by: Ramin Halavati <rhalavati@chromium.org>
Commit-Queue: Ramin Halavati <rhalavati@chromium.org>
Cr-Commit-Position: refs/heads/master@{#565978}

testing/scripts/test_traffic_annotation_auditor.py

@@ -38,7 +38,7 @@ def main_compile_targets(args):
   # TODO(https://crbug.com/844014): Merge windows and non-windows cases after
   # finding the minimum set of sufficient build targets.
   if sys.platform == 'cygwin' or sys.platform.startswith('win'):
-    json.dump(['chrome' 'remoting/host:host', 'remoting/client:client'],
+    json.dump(['chrome', 'remoting/host:host', 'remoting/client:client'],
               args.output)
   else:
     json.dump(['all'], args.output)