Make telemetry tests verbose.

At a minimum this will help a lot with looking at graphics log files.
It is also the default for the Chromium GPU bot.

TEST=None.
BUG=None.

Change-Id: Ic03289482dcc92f9ce04afeed5d4043d386b467a
Reviewed-on: https://chromium-review.googlesource.com/200689
Commit-Queue: Ilja Friedel <ihf@chromium.org>
Tested-by: Ilja Friedel <ihf@chromium.org>
Reviewed-by: Toni Barzic <tbarzic@chromium.org>
diff --git a/server/cros/telemetry_runner.py b/server/cros/telemetry_runner.py
index 8bd89da..8db4810 100644
--- a/server/cros/telemetry_runner.py
+++ b/server/cros/telemetry_runner.py
@@ -291,6 +291,7 @@
         telemetry_cmd.extend(
                 ['python',
                  script,
+                 '--verbose',
                  '--browser=cros-chrome',
                  '--remote=%s' % self._host.hostname,
                  test_or_benchmark])