[Telemetry] Fix a few more potential deadlocks.

tools/telemetry/telemetry/core/platform/linux_platform_backend.py

Index: tools/telemetry/telemetry/core/platform/linux_platform_backend.py
diff --git a/tools/telemetry/telemetry/core/platform/linux_platform_backend.py b/tools/telemetry/telemetry/core/platform/linux_platform_backend.py
index 71c68bbfbe859528adee4187a26dd6c39c1932e9..92861be9b0b02c5b232f8f41e57048f6d23ffcf2 100644
--- a/tools/telemetry/telemetry/core/platform/linux_platform_backend.py
+++ b/tools/telemetry/telemetry/core/platform/linux_platform_backend.py
@@ -93,7 +93,7 @@ class LinuxPlatformBackend(
       changed |= cloud_storage.GetIfChanged(
           ipfw_mod, cloud_storage.INTERNAL_BUCKET)
     except cloud_storage.CloudStorageError, e:
-      logging.error(e)
+      logging.error(str(e))
       logging.error('You may proceed by manually installing dummynet. See: '
                     'http://info.iet.unipi.it/~luigi/dummynet/')
       sys.exit(1)
@@ -114,7 +114,7 @@ class LinuxPlatformBackend(
       cloud_storage.GetIfChanged(bin_path, cloud_storage.INTERNAL_BUCKET)
       os.chmod(bin_path, 0755)
     except cloud_storage.CloudStorageError, e:
-      logging.error(e)
+      logging.error(str(e))
       if fallback_package:
         logging.error('You may proceed by manually installing %s via:\n'
                       'sudo apt-get install %s' % (bin_name, fallback_package))