Added

makefiles/linux/config_linux_default.mk

src/drivers/device/device.h

src/drivers/device/device_nuttx.h

src/drivers/device/module.mk

src/drivers/device/vcdev.cpp

src/drivers/device/vdevice.cpp

src/drivers/device/vdevice.h

src/platforms/linux/vcdev_test/module.mk

src/platforms/linux/vcdev_test/vcdevtest_example.cpp

src/platforms/linux/vcdev_test/vcdevtest_example.h

src/platforms/linux/vcdev_test/vcdevtest_main.cpp

src/platforms/linux/vcdev_test/vcdevtest_start_linux.cpp

src/platforms/px4_posix.h