ANDROID: arm64 defconfig / build config for cuttlefish

Add an arm64 defconfig with the Android and cuttlefish feature sets
merged in. This has been boot tested only on the QEMU virt model for
AArch64.

$ qemu-system-aarch64 -M virt -cpu cortex-a57 \
    -kernel arch/arm64/boot/Image.gz -serial stdio

Bug: 118442619
Change-Id: I99f3b78af85de8d051226f202351bd852a032248
Signed-off-by: Alistair Strachan <astrachan@google.com>
diff --git a/build.config.cuttlefish.aarch64 b/build.config.cuttlefish.aarch64
new file mode 100644
index 0000000..2635f5d
--- /dev/null
+++ b/build.config.cuttlefish.aarch64
@@ -0,0 +1,16 @@
+ARCH=arm64
+BRANCH=android-4.9
+CLANG_TRIPLE=aarch64-linux-gnu-
+CROSS_COMPILE=aarch64-linux-androidkernel-
+DEFCONFIG=cuttlefish_defconfig
+EXTRA_CMDS=''
+KERNEL_DIR=common
+POST_DEFCONFIG_CMDS="check_defconfig"
+CLANG_PREBUILT_BIN=prebuilts-master/clang/host/linux-x86/clang-r328903/bin
+LINUX_GCC_CROSS_COMPILE_PREBUILTS_BIN=prebuilts/gcc/linux-x86/aarch64/aarch64-linux-android-4.9/bin
+FILES="
+arch/arm64/boot/Image.gz
+vmlinux
+System.map
+"
+STOP_SHIP_TRACEPRINTK=1