fixup! CMake tools: use CMAKE_CURRENT_LIST_DIR instead of MBED_PATH

Author: 0xc0170

CMakeLists.txt

@@ -221,7 +221,7 @@ function(mbed_generate_map_file target)
          TARGET
              ${target}
          POST_BUILD
-         COMMAND ${Python3_EXECUTABLE} ${mbed-os_SOURCE_DIR}/tools/memap.py -t ${MBED_TOOLCHAIN} ${CMAKE_CURRENT_BINARY_DIR}/${target}${CMAKE_EXECUTABLE_SUFFIX}.map
+         COMMAND ${Python3_EXECUTABLE} ${PROJECT_SOURCE_DIR}/tools/memap.py -t ${MBED_TOOLCHAIN} ${CMAKE_CURRENT_BINARY_DIR}/${target}${CMAKE_EXECUTABLE_SUFFIX}.map
          WORKING_DIRECTORY
              ${CMAKE_CURRENT_BINARY_DIR}
          COMMENT