Restrict cuttlefish builds to VSOC only.

Change-Id: I56016e65782a5a0db72b112d2295eb4bb699f5c4
diff --git a/Android.mk b/Android.mk
new file mode 100644
index 0000000..1f7c7db
--- /dev/null
+++ b/Android.mk
@@ -0,0 +1,17 @@
+# Copyright (C) 2017 The Android Open Source Project
+#
+# 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.
+ifneq ($(filter vsoc_x86 vsoc_x86_64, $(TARGET_DEVICE)),)
+LOCAL_PATH:= $(call my-dir)
+include $(call all-makefiles-under,$(LOCAL_PATH))
+endif