Mark pcre_test slow in dart2js_with_kernel too

tests/corelib_2/corelib_2.status

Index: tests/corelib_2/corelib_2.status
diff --git a/tests/corelib_2/corelib_2.status b/tests/corelib_2/corelib_2.status
index f2e0471399f55672511f89ad352cd7db9c8258cf..d0d9e937cc50f5a8da74db16d7269e8f83cdf8ea 100644
--- a/tests/corelib_2/corelib_2.status
+++ b/tests/corelib_2/corelib_2.status
@@ -412,6 +412,8 @@ string_static_test: MissingCompileTimeError
 [ $compiler == dart2js && $runtime != none && !$dart2js_with_kernel]
 error_stack_trace1_test: RuntimeError # Issue 12399
 symbol_reserved_word_test/03: RuntimeError # Issue 19972, new Symbol('void') should be allowed.
+
+[ $compiler == dart2js && $runtime != none ]
 regexp/pcre_test: Pass, Slow # Issue 21593
 
 [ !$checked && (($compiler == none && $runtime == vm) || $compiler == dart2js) ]