Mark lib/mirrors/native_class_test slow on chrome linux

tests/lib/lib.status

Index: tests/lib/lib.status
diff --git a/tests/lib/lib.status b/tests/lib/lib.status
index aff944254a017b0d091b4159f9aa3a5ca7f9d382..493fe57812227e7ff0e585477d301e955ec1abc0 100644
--- a/tests/lib/lib.status
+++ b/tests/lib/lib.status
@@ -243,6 +243,9 @@ async/timer_isActive_test: Fail, Pass, Timeout # Issue 22696
 async/slow_consumer_test: Pass, Timeout # Issue 22696
 async/catch_errors11_test: Pass, Timeout # Issue 22696
 
+[ $runtime == chrome && $system == linux ]
+mirrors/native_class_test: Pass, Slow
+
 [ $runtime == chrome || $runtime == ff ]
 convert/streamed_conversion_utf8_encode_test: SkipSlow # Times out. Issue 22050
 convert/streamed_conversion_utf8_decode_test: SkipSlow # Times out. Issue 22050