Disable 004-StackWalk for debuggable.

Test requires to have AOT code.

Test: 004-StackWalk
Change-Id: I433676e49bf02b1898e80c856a27b8afcab2dc2f
diff --git a/test/knownfailures.json b/test/knownfailures.json
index 05c9aa9..768bc79 100644
--- a/test/knownfailures.json
+++ b/test/knownfailures.json
@@ -697,9 +697,14 @@
         "description": ["Tests that depend on input-vdex are not supported with compact dex"]
     },
     {
-        "tests": ["661-oat-writer-layout", "004-StackWalk"],
+        "tests": ["661-oat-writer-layout"],
         "variant": "interp-ac | interpreter | jit | no-prebuild | no-image | trace | redefine-stress | jvmti-stress",
-        "description": ["Tests are designed to only check --optimizing"]
+        "description": ["Test is designed to only check --optimizing"]
+    },
+    {
+        "tests": ["004-StackWalk"],
+        "variant": "interp-ac | interpreter | jit | no-prebuild | no-image | trace | redefine-stress | jvmti-stress | debuggable",
+        "description": ["Test is designed to only check --optimizing"]
     },
     {
         "tests": "674-HelloWorld-Dm",