ART: Change meaning of run-test's --no-image

Do not test runtime image generation. Instead test running without
an image by disabling image patching.

Bug: 67596919
Test: m test-art-host
Test: art/test/testrunner/run_build_test_target.py art-no-image
Change-Id: Idf6f0368ea94efbc61285457711af896a80e2ffb
diff --git a/test/knownfailures.json b/test/knownfailures.json
index 47b2f22..c6b6574 100644
--- a/test/knownfailures.json
+++ b/test/knownfailures.json
@@ -384,6 +384,12 @@
         "variant": "jvmti-stress & jit | redefine-stress & jit"
     },
     {
+        "test_patterns": ["616-cha"],
+        "description": ["The test assumes a boot image exists."],
+        "bug": "http://b/34193647",
+        "variant": "no-image"
+    },
+    {
         "tests": [ "663-odd-dex-size",
                    "663-odd-dex-size2",
                    "663-odd-dex-size3",