Also backlist tests under jit/ndebuggable.

In case the JIT had time to kick in.

Test: test.py
Change-Id: Ib2fae33df279603c3e564718194a6f18b867756a
diff --git a/test/knownfailures.json b/test/knownfailures.json
index 88a7b05..87d857e 100644
--- a/test/knownfailures.json
+++ b/test/knownfailures.json
@@ -248,7 +248,7 @@
                   "602-deoptimizeable"],
         "description": ["Tests that should fail when the optimizing compiler ",
                         "compiles them non-debuggable."],
-        "variant": "optimizing & ndebuggable | regalloc_gc & ndebuggable | speed-profile & ndebuggable"
+        "variant": "optimizing & ndebuggable | regalloc_gc & ndebuggable | speed-profile & ndebuggable | jit & ndebuggable"
     },
     {
         "tests": "596-app-images",