Don't archive test results on Windows

Change-Id: I519ae16fe84af8c90e18cf8ead7a65e7c4b2b141
diff --git a/tools/test.py b/tools/test.py
index ba459e7..68fa829 100755
--- a/tools/test.py
+++ b/tools/test.py
@@ -112,7 +112,7 @@
     return_code = gradle.RunGradle(gradle_args + ['-Pdex_vm=%s' % art_vm],
                                    throw_on_failure=False)
     if return_code != 0:
-      if options.archive_failures:
+      if options.archive_failures and os.name != 'nt':
         archive_failures()
       return return_code