Smaller networks - keyword_spotting_dnn_medium_int8

Added: Baremetal application 'keyword_spotting_dnn_medium_int8' as and
executable test. Run with ctest -R keyword_spotting_dnn_medium_int8

Model taken from ML-zoo, run through vela, and hexdumped to C header
format.

Change-Id: Iba97a2c89277131605e233f0c9241581ea178755
diff --git a/applications/baremetal/CMakeLists.txt b/applications/baremetal/CMakeLists.txt
index 836ec28..299b3f1 100644
--- a/applications/baremetal/CMakeLists.txt
+++ b/applications/baremetal/CMakeLists.txt
@@ -18,4 +18,8 @@
 
 ethosu_add_executable_test(baremetal_keyword_cnn PRIVATE
     SOURCES main.cpp)
-target_include_directories(baremetal_keyword_cnn PRIVATE models/keyword_spotting_cnn_small_int8)
\ No newline at end of file
+target_include_directories(baremetal_keyword_cnn PRIVATE models/keyword_spotting_cnn_small_int8)
+
+ethosu_add_executable_test(baremetal_keyword_dnn PRIVATE
+    SOURCES main.cpp)
+target_include_directories(baremetal_keyword_dnn PRIVATE models/keyword_spotting_dnn_medium_int8)
\ No newline at end of file