Fix flaky testRecursedepsCustomdepsOverride.

Fixed: 1345847
Change-Id: I3d4ea30210f0bf7cb5ace5095d06ca459a7039b5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/3783155Reviewed-by: Gavin Mak <gavinmak@google.com>
Commit-Queue: Joanna Wang <jojwang@chromium.org>
Auto-Submit: Joanna Wang <jojwang@chromium.org>

tests/gclient_test.py

@@ -879,7 +879,8 @@ class GclientTest(trial_dir.TestCase):
     options, _ = gclient.OptionParser().parse_args([])
     obj = gclient.GClient.LoadCurrentConfig(options)
     obj.RunOnDeps('None', [])
-    self.assertEqual(
+    six.assertCountEqual(
+        self,
         [
           ('foo', 'svn://example.com/foo'),
           (os.path.join('foo', 'bar'), 'svn://example.com/override'),