Add third_party/cpu_features to Cronet's copybara

See https://android-review.git.corp.google.com/c/platform/external/cronet/+/2719789/2 for more information.
Test: None

Change-Id: I3598857b2af5e09eee01ac3493135ec36b10e9b8
diff --git a/Cronet/tools/import/copy.bara.sky b/Cronet/tools/import/copy.bara.sky
index 5ae4a6b..f96ee63 100644
--- a/Cronet/tools/import/copy.bara.sky
+++ b/Cronet/tools/import/copy.bara.sky
@@ -86,6 +86,7 @@
         "third_party/brotli/**",
         # Note: Only used for tests.
         "third_party/ced/**",
+        "third_party/cpu_features/**",
         # Note: Only used for tests.
         "third_party/google_benchmark/**",
         # Note: Only used for tests.