Skip tests 1923 and 1924 on ASAN 64

They fail due to stack overflow.

Bug: 65189092
Test: build
Change-Id: Ib47c3a83763907fdf929add10a9ea9780b2f903a
diff --git a/test/knownfailures.json b/test/knownfailures.json
index 20cfc34..df7544e 100644
--- a/test/knownfailures.json
+++ b/test/knownfailures.json
@@ -681,6 +681,16 @@
         "env_vars": {"SANITIZE_HOST": "address"}
     },
     {
+        "tests": [
+            "1923-frame-pop",
+            "1924-frame-pop-toggle"
+        ],
+        "description": "ASAN seems to make these tests overflow their stacks.",
+        "variant": "64",
+        "bug": "b/65189092",
+        "env_vars": {"SANITIZE_HOST": "address"}
+    },
+    {
         "tests": ["988-method-trace"],
         "variant": "redefine-stress | jvmti-stress",
         "description": "Test disabled due to redefine-stress disabling intrinsics which changes the trace output slightly."