fix up testing for the new plugin layout

testing/makefiles/shared.mk

@@ -14,6 +14,8 @@ shared_defines := \
 shared_includes := \
 		-I${top_dir} \
 		-I${top_dir}/src \
+		-I${top_dir}/plugins/Kaleidoscope-Hardware-Model01/src \
+		-I${top_dir}/plugins/Kaleidoscope-Hardware-Keyboardio-Model01/src \
 		-I${arduino_platform_path}/cores/arduino \
 		-I${arduino_platform_path}/libraries/KeyboardioHID/src \
 		-I${top_dir}/testing/googletest/googlemock/include \