Fixed load control object and unit test. Added recipe to Makefile for Zephyr OS twister unit testing. (#710)

zephyr/tests/bacnet/basic/object/lo/CMakeLists.txt

@@ -19,6 +19,7 @@ get_filename_component(BACNET_NAME ${BACNET_BASE} NAME)
 
 # Update include path for this module
 list(APPEND BACNET_INCLUDE ${BACNET_BASE}/src)
+set(TEST_OBJECT_SRC ${BACNET_BASE}/test/bacnet/basic/object/test)
 
 if(BOARD STREQUAL unit_testing)
   file(RELATIVE_PATH BACNET_INCLUDE $ENV{ZEPHYR_BASE} ${BACNET_BASE}/src)
@@ -26,7 +27,7 @@ if(BOARD STREQUAL unit_testing)
   list(APPEND SOURCES
     ${BACNET_SRC_PATH}.c
     ${BACNET_TEST_PATH}/src/main.c
-    ${BACNET_TEST_PATH}/../mock/device_mock.c
+    ${TEST_OBJECT_SRC}/device_mock.c
     )
 
   get_filename_component(BACNET_OBJECT_SRC ${BACNET_SRC_PATH} PATH)