Add xmllite and xmpp sources to third_party/

third_party/libjingle_xmpp/run_all_unittests.cc

Index: third_party/libjingle_xmpp/run_all_unittests.cc
diff --git a/third_party/libjingle_xmpp/run_all_unittests.cc b/third_party/libjingle_xmpp/run_all_unittests.cc
new file mode 100644
index 0000000000000000000000000000000000000000..49c887b9123e5290364ba2edbbf4be0e3b0b3d65
--- /dev/null
+++ b/third_party/libjingle_xmpp/run_all_unittests.cc
@@ -0,0 +1,10 @@
+// Copyright (c) 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "testing/gtest/include/gtest/gtest.h"
+
+int main(int argc, char* argv[]) {
+  ::testing::InitGoogleTest(&argc, argv);
+  return RUN_ALL_TESTS();
+}