For ONL and BAL v3.0 build environment, you could only build for ONL and BAL source codes now.

Change-Id: I23d41b7364f5066355959d63eed94e3394aad024
(cherry picked from commit 355ef92e177a2017e8c3d1fd10fe6095c33cd798)
diff --git a/agent/download/Makefile.onl b/agent/download/Makefile.onl
new file mode 100644
index 0000000..a025194
--- /dev/null
+++ b/agent/download/Makefile.onl
@@ -0,0 +1,16 @@
+# Copyright (C) 2018 Makefile
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+asfvolt16-4.14:
+	cd OpenNetworkLinux && docker/tools/onlbuilder --non-interactive -8 -c ./build-asfvolt16.sh