Add test 980 to knownfailures for no-image + jit

This configuration seems to be flaky for unknown reasons. It appears
there is some sort of race between the jit and stack-walking that
leads to us being unable to find the JIT compiled transition frames in
some situations.

Test: none
Bug: 73333076
Change-Id: I4e2a2f2fc4ec935edd0cd832dec6db739130d176
diff --git a/test/knownfailures.json b/test/knownfailures.json
index 0206b15..c5e4221 100644
--- a/test/knownfailures.json
+++ b/test/knownfailures.json
@@ -1175,6 +1175,15 @@
         "description": ["Timeout with ASan and interp-ac on 32-bit host (x86)."]
     },
     {
+        "tests": ["980-redefine-object"],
+        "description": ["This test appears to be unusally flaky on no-image + jit. The cause of ",
+                        "this flakiness is unknown but appears to be related to the ",
+                        "jit-compilation of JNI bridges. Until more investigation is done we skip ",
+                        "this test."],
+        "bug": "http://b/73333076",
+        "variant": "no-image & jit"
+    },
+    {
         "tests": ["454-get-vreg", "457-regs"],
         "variant": "baseline",
         "description": ["Tests are expected to fail with baseline."]