Temporarily suppress TimeZoneTest.testAllDisplayNames.

bug: 22786792
Change-Id: Ib256928e8b8e2aac93e4001426613c5629728919
diff --git a/tools/libcore_failures.txt b/tools/libcore_failures.txt
index 992a8a6..d58f034 100644
--- a/tools/libcore_failures.txt
+++ b/tools/libcore_failures.txt
@@ -150,5 +150,12 @@
   result: EXEC_FAILED,
   modes: [device],
   names: ["org.apache.harmony.tests.java.lang.ClassTest#test_forNameLjava_lang_String"]
+},
+{
+  description: "TimeZoneTest.testAllDisplayNames times out, needs investigation",
+  result: EXEC_FAILED,
+  modes: [device],
+  names: ["libcore.java.util.TimeZoneTest.testAllDisplayNames"],
+  bug: 22786792
 }
 ]