Update expectations for volantis.

Change-Id: Icd4aecd9b7a274febfd99bad6432bb9d46f9e1d3
diff --git a/tools/libcore_failures.txt b/tools/libcore_failures.txt
index a09d86f..82423e1 100644
--- a/tools/libcore_failures.txt
+++ b/tools/libcore_failures.txt
@@ -93,5 +93,12 @@
   result: EXEC_FAILED,
   name: "org.apache.harmony.security.tests.java.security.Signature2Test#test_verify$BII",
   bug: 18869265
+},
+{
+  description: "Test sometimes timeouts on volantis",
+  result: EXEC_TIMEOUT,
+  modes_variants: [[device,X64]],
+  names: ["libcore.java.lang.SystemTest#testArrayCopyConcurrentModification"],
+  bug: 19165288
 }
 ]