Add snapshot dir and script to build VNDK snapshot

The build script, build.sh, invokes the 'vndk' phony make target
to generate VNDK snapshots for all four archs arm, arm64, x86,
x86_64.

Test: development/vndk/snapshot/build.sh
Bug: 66059995
Change-Id: I0a48bb88bafc5e4a015f1016afcd55f616ab02e2
diff --git a/vndk/snapshot/build.sh b/vndk/snapshot/build.sh
new file mode 100755
index 0000000..9bb768b
--- /dev/null
+++ b/vndk/snapshot/build.sh
@@ -0,0 +1,27 @@
+#!/bin/bash
+#
+# 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.
+#
+
+TARGET_BUILD_VARIANT=userdebug
+
+echo "-----Source build/envsetup.sh"
+source build/envsetup.sh
+
+echo "-----Generating VNDK snapshot for arm, arm64"
+make -j vndk dist TARGET_PRODUCT=aosp_arm64_ab TARGET_BUILD_VARIANT=$TARGET_BUILD_VARIANT BOARD_VNDK_VERSION=current
+
+echo "-----Generating VNDK snapshot for x86, x86_64"
+make -j vndk dist TARGET_PRODUCT=aosp_x86_64 TARGET_BUILD_VARIANT=$TARGET_BUILD_VARIANT BOARD_VNDK_VERSION=current