Make runtest more fault tolerant on test run failures.

Adjust so when running multiple suites, the whole run is not aborted on a
single suite failure.
diff --git a/testrunner/runtest.py b/testrunner/runtest.py
index a4d7231..a3135db 100755
--- a/testrunner/runtest.py
+++ b/testrunner/runtest.py
@@ -320,7 +320,10 @@
         self._DoBuild()
 
       for test_suite in self._GetTestsToRun():
-        test_suite.Run(self._options, self._adb)
+        try:
+          test_suite.Run(self._options, self._adb)
+        except errors.WaitForResponseTimedOutError:
+          logger.Log("Timed out waiting for response")
 
     except KeyboardInterrupt:
       logger.Log("Exiting...")