NuttX cmake support optional compressed defconfigs

CMakeLists.txt

cmake/px4_add_library.cmake

platforms/nuttx/CMakeLists.txt

platforms/nuttx/NuttX/CMakeLists.txt

platforms/nuttx/cmake/init.cmake

platforms/nuttx/cmake/px4_impl_os.cmake

src/drivers/boards/common/CMakeLists.txt

src/drivers/boards/common/board_crashdump.c

src/lib/cdev/CDev.cpp

src/modules/uORB/CMakeLists.txt

src/platforms/common/CMakeLists.txt

src/platforms/common/module.cpp

src/platforms/common/px4_cli.cpp

src/platforms/common/px4_log.c

src/platforms/common/shutdown.cpp