Rebase changes on upstream master

CMakeLists.txt

Makefile

cmake/configs/nuttx_px4fmu-v2_default.cmake

cmake/configs/qurt_eagle_release.cmake

cmake/posix/px4_impl_posix.cmake

cmake/toolchains/Toolchain-arm-linux-gnueabihf.cmake

src/drivers/device/device.h

src/drivers/device/vfile.cpp

src/include/mavlink/mavlink_log.h

...odules/attitude_estimator_q/attitude_estimator_q_main.cpp

src/modules/commander/commander.cpp

src/modules/mc_pos_control/mc_pos_control_main.cpp

src/modules/muorb/adsp/module.mk

src/modules/muorb/krait/CMakeLists.txt

src/modules/navigator/mission_block.cpp

src/modules/simulator/simulator_mavlink.cpp

src/modules/systemlib/circuit_breaker_params.c

src/modules/systemlib/param/param_shmem.c

src/modules/systemlib/system_params.c

src/modules/uORB/uORBDevices_posix.cpp