Disable test 727 on target.

The `run` script erroneously evaluates $PWD on host
and passes the path to dex2oat on target.

Test: testrunner.py --target -t 727  # skipped
Bug: 161898207
Change-Id: Idd79da2bf22b0a1ba81c5457e3466a99bf254c6c
diff --git a/test/knownfailures.json b/test/knownfailures.json
index 70572cb..139af43 100644
--- a/test/knownfailures.json
+++ b/test/knownfailures.json
@@ -1336,6 +1336,12 @@
         "description": ["Timeouts."]
     },
     {
+        "tests": ["727-checker-unresolved-class"],
+        "variant": "target",
+        "bug": "b/161898207",
+        "description": ["The run script evaluates $PWD on host."]
+    },
+    {
         "tests": ["003-omnibus-opcodes",
                   "051-thread",
                   "427-bounds",