Status file two flaky pkg bot tests.

Change-Id: I2b65b7390210bfaad5d1bcf03e12732ae9048c75
Reviewed-on: https://dart-review.googlesource.com/67900
Reviewed-by: William Hesse <whesse@google.com>
Commit-Queue: Devon Carew <devoncarew@google.com>

Author: devoncarew

third_party/pkg_tested/pkg_tested.status

@@ -17,6 +17,8 @@ pub/test/transformer/loads_a_diamond_transformer_dependency_graph_test: Pass, Sl
 [ $runtime == vm ]
 dart_style/test/command_line_test: Skip # Issue 33473
 http_io/test/http_cross_process_test: Skip # Fails with --no-preview-dart-2
+http_io/test/http_proxy_advanced_test: Pass, RuntimeError # flaky
+http_io/test/http_proxy_test: Pass, RuntimeError # flaky
 
 [ $browser ]
 dart_style/*: SkipByDesign