Re-enable test 529-checker-unresolved in `no-prebuild` configurations.

Test: art/test/testrunner/testrunner.py --no-prebuild --relocate --no-relocate -t 529-checker-unresolved
Bug: 27784033
Change-Id: I9e9153805592d6f23f09235b6879cf551113f0bb
diff --git a/test/knownfailures.json b/test/knownfailures.json
index 4bf1ee2..1d4be6a 100644
--- a/test/knownfailures.json
+++ b/test/knownfailures.json
@@ -54,11 +54,6 @@
                         "doesn't (and isn't meant to) work with --prebuild."]
     },
     {
-        "tests": ["529-checker-unresolved"],
-        "variant": "no-prebuild",
-        "bug": "http://b/27784033"
-    },
-    {
         "tests": ["117-nopatchoat",
                   "147-stripped-dex-fallback",
                   "608-checker-unresolved-lse"],