[test] Log output on error in perf runner

NOTRY=true
TBR=sergiyb@chromium.org

Bug: chromium:866862
Change-Id: I52737a644c36f78b1803a443b89600bb7a114082
Reviewed-on: https://chromium-review.googlesource.com/1168485Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54997}

tools/run_perf.py

@@ -764,6 +764,9 @@ class AndroidPlatform(Platform):  # pragma: no cover
           timeout=runnable.timeout,
       )
       logging.info(title % "Stdout" + "\n%s", stdout)
+    except android.CommandFailedException as e:
+      logging.info(title % "Stdout" + "\n%s", e.output)
+      raise
     except android.TimeoutException:
       logging.warning(">>> Test timed out after %ss.", runnable.timeout)
       stdout = ""