WIP startup_shutdown test with ASAN on

cmake/common/px4_base.cmake

@@ -701,6 +701,7 @@ function(px4_add_common_flags)
 		)
 	endif()
 
+	# address sanitizer
 	if ($ENV{MEMORY_DEBUG} MATCHES "1")
 		message(STATUS "address sanitizer enabled")
 		if ("${OS}" STREQUAL "nuttx")
@@ -740,6 +741,11 @@ function(px4_add_common_flags)
 			)
 	endif()
 
+	# code coverage
+	if ($ENV{PX4_CODE_COVERAGE} MATCHES "1")
+		set(max_optimization -O0)
+	endif()
+
 	if (NOT ${CMAKE_C_COMPILER_ID} MATCHES ".*Clang.*")
 		list(APPEND _optimization_flags
 			-fno-strength-reduce

cmake/configs/posix_sitl_test.cmake

@@ -0,0 +1,5 @@
+include(cmake/configs/posix_sitl_default.cmake)
+
+set(config_sitl_rcS_dir
+	posix-configs/SITL/init/test
+	)