Add trustzone application example

Add example project that builds both secure and nonsecure world
sides and the inference is done on the secure side.
This commit includes the mpc driver as found in the upstream
trustedfirmware git repository
https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git
(8c0a234e453b51e6606d11599d0cb15097c3da48)

The model,input and output used are described in the README.md in this
directory.

Change-Id: Ie54904a38d54df4de2d6936f066c388ea58e396b
diff --git a/targets/corstone-300/CMakeLists.txt b/targets/corstone-300/CMakeLists.txt
index 03226c7..c734044 100644
--- a/targets/corstone-300/CMakeLists.txt
+++ b/targets/corstone-300/CMakeLists.txt
@@ -50,6 +50,9 @@
 # Corstone-300
 #############################################################################
 
+get_filename_component(ETHOSU_TARGET ${CMAKE_CURRENT_SOURCE_DIR} NAME)
+message("Configuring target ${ETHOSU_TARGET}")
+
 # Enable trustzone support in core_software
 set(TRUSTZONE_BUILD ON)