MLECO-929 Add Object Detection sample application using the public ArmNN C++ API

Change-Id: I14aa1b4b726212cffbefd6687203f93f936fa872
Signed-off-by: Éanna Ó Catháin <eanna.ocathain@arm.com>
diff --git a/samples/ObjectDetection/cmake/aarch64-toolchain.cmake b/samples/ObjectDetection/cmake/aarch64-toolchain.cmake
new file mode 100644
index 0000000..bdd02f8
--- /dev/null
+++ b/samples/ObjectDetection/cmake/aarch64-toolchain.cmake
@@ -0,0 +1,20 @@
+# Copyright © 2020 Arm Ltd and Contributors. All rights reserved.
+# SPDX-License-Identifier: MIT
+
+# specify the cross compiler
+set(GNU_MACHINE "aarch64-linux-gnu")
+set(CROSS_PREFIX "aarch64-linux-gnu-")
+
+set(CMAKE_C_COMPILER   ${CROSS_PREFIX}gcc)
+set(CMAKE_CXX_COMPILER ${CROSS_PREFIX}g++)
+set(CMAKE_AR           ${CROSS_PREFIX}ar)
+set(CMAKE_STRIP        ${CROSS_PREFIX}strip)
+set(CMAKE_LINKER       ${CROSS_PREFIX}ld)
+
+set(CMAKE_CROSSCOMPILING true)
+set(CMAKE_SYSTEM_NAME Linux)
+
+set(CMAKE_SYSTEM_PROCESSOR aarch64)
+
+set(OPENCV_EXTRA_ARGS   "-DENABLE_NEON=ON"
+                        "-DCMAKE_TOOLCHAIN_FILE=platforms/linux/aarch64-gnu.toolchain.cmake")
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