Ability to generate SDK system-images for arm64 and x86_64

Change-Id: I2715a668271ed88fcd0c8c97ac35d05fcdd34a06

build/sdk-android-arm64-v8a.atree

@@ -0,0 +1,22 @@
+#
+# Copyright (C) 2014 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.
+#
+
+# Copy the ARMv7 specific kernel image to .../kernel-qemu
+# TODO(RM) need a qemu-kernel/arm64? "arm" should be ${TARGET_ARCH}
+prebuilts/qemu-kernel/arm/kernel-qemu-armv7 system-images/${PLATFORM_NAME}/${TARGET_CPU_ABI}/kernel-qemu
+
+# version files for the SDK updater, from development.git
+${HOST_OUT}/development/sdk/images_arm64-v8a_source.properties system-images/${PLATFORM_NAME}/${TARGET_CPU_ABI}/source.properties