Update file lists.

BUILD

diff --git a/BUILD b/BUILD
index ab147e5..8b1046b 100644
--- a/BUILD
+++ b/BUILD
@@ -464,8 +464,8 @@
         "src/google/protobuf/message_unittest.cc",
         "src/google/protobuf/no_field_presence_test.cc",
         "src/google/protobuf/preserve_unknown_enum_test.cc",
-        "src/google/protobuf/proto3_arena_unittest.cc",
         "src/google/protobuf/proto3_arena_lite_unittest.cc",
+        "src/google/protobuf/proto3_arena_unittest.cc",
         "src/google/protobuf/proto3_lite_unittest.cc",
         "src/google/protobuf/reflection_ops_unittest.cc",
         "src/google/protobuf/repeated_field_reflection_unittest.cc",