Add some debugging for when hostapd times out during startup

TEST=network_WiFi_SimpleConnect.wifi_checkWPA_TKIP still passes with
this logic.
BUG=chromium:393667

Change-Id: I13cbc1009953e27cc816479132ac0c70a51aafc7
Reviewed-on: https://chromium-review.googlesource.com/208120
Reviewed-by: Peter Qiu <zqiu@chromium.org>
Commit-Queue: Christopher Wiley <wiley@chromium.org>
Tested-by: Christopher Wiley <wiley@chromium.org>
diff --git a/server/site_linux_router.py b/server/site_linux_router.py
index bbd296b..e710e3a 100644
--- a/server/site_linux_router.py
+++ b/server/site_linux_router.py
@@ -241,6 +241,8 @@
             if success:
                 break
 
+            # TODO(wiley) Remove this once we resolve crbug.com/393667
+            self.host.run('tail -1 %s' % log_file, ignore_status=True)
             # A common failure is an invalid router configuration.
             # Detect this and exit early if we see it.
             bad_config = self.router.run(