Issue 28478. Add new strong mode bounds failing tests.

pkg/dev_compiler/test/not_yet_strong_tests.dart

Index: pkg/dev_compiler/test/not_yet_strong_tests.dart
diff --git a/pkg/dev_compiler/test/not_yet_strong_tests.dart b/pkg/dev_compiler/test/not_yet_strong_tests.dart
index 9ca06f3b29b074f9f8f3be3acb33fcca3f9c409f..0d67109d067cb2e1bf96a7e4fc11140448de1a3b 100644
--- a/pkg/dev_compiler/test/not_yet_strong_tests.dart
+++ b/pkg/dev_compiler/test/not_yet_strong_tests.dart
@@ -930,6 +930,7 @@ final notYetStrongTests = new HashSet<String>.from([
   'language/is_not_class2_test',
   'language/is_object_test',
   'language/isnot_malformed_type_test',
+  'language/issue_23914_test', // issue 28478
   'language/issue11724_test',
   'language/issue11793_test',
   'language/issue13474_test',
@@ -1447,6 +1448,8 @@ final notYetStrongTests = new HashSet<String>.from([
   'language/proxy_test_02_multi',
   'language/proxy_test_05_multi',
   'language/proxy_test_06_multi',
+  'language/recursive_generic_test', // issue 28478
+  'language/recursive_inheritance_test', // issue 28478
   'language/redirecting_constructor_initializer_test',
   'language/redirecting_factory_default_values_test_01_multi',
   'language/redirecting_factory_default_values_test_02_multi',
@@ -2090,6 +2093,7 @@ final notYetStrongTests = new HashSet<String>.from([
   'corelib/symbol_test_none_multi',
   'corelib/uri_path_test',
   'corelib/uri_query_test',
+  'lib/collection/linked_list_test', // issue 28478
   'lib/convert/chunked_conversion1_test',
   'lib/math/min_max_test',
   'lib/typed_data/float32x4_test',