Disable test 426 on redefinition configurations.

Slicer is unhappy with the generated dex.

Test: 426
Change-Id: If35be2098ac99bae9822abb15427028a470f09ee
diff --git a/test/knownfailures.json b/test/knownfailures.json
index f93eba5..83918a4 100644
--- a/test/knownfailures.json
+++ b/test/knownfailures.json
@@ -414,6 +414,12 @@
         "variant": "jvmti-stress | redefine-stress"
     },
     {
+        "tests": [ "426-monitor"],
+        "description": ["Hitting an issue with slicer."],
+        "bug": "http://b/235319568",
+        "variant": "jvmti-stress | redefine-stress"
+    },
+    {
         "test_patterns": ["[0-9]*-checker-.*"],
         "description": ["Checker tests are not compatible with jvmti."],
         "variant": "jvmti-stress | redefine-stress | trace-stress | field-stress | step-stress"