adds APB pinlevel adapter

tests/apb_pin_level/CMakeLists.txt

@@ -0,0 +1,9 @@
+project (apb_pin_level)
+
+add_executable(${PROJECT_NAME} 
+	bus_test.cpp
+	${test_util_SOURCE_DIR}/sc_main.cpp
+)
+target_link_libraries (${PROJECT_NAME} PUBLIC test_util)
+
+catch_discover_tests(${PROJECT_NAME})